Long-term Debt - Additional Information (Detail)
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1 Months Ended |
3 Months Ended |
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Jan. 01, 2021
USD ($)
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May 12, 2020
USD ($)
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Sep. 16, 2019
USD ($)
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Jul. 31, 2022
USD ($)
shares
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Jul. 31, 2021
USD ($)
shares
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Jun. 30, 2021
USD ($)
shares
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Jan. 31, 2021
USD ($)
shares
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Mar. 31, 2023
USD ($)
d
$ / shares
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Sep. 30, 2022
USD ($)
shares
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Mar. 31, 2022
USD ($)
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Sep. 30, 2021
USD ($)
shares
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Mar. 31, 2021
USD ($)
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Dec. 31, 2022
USD ($)
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Sep. 11, 2019
USD ($)
CounterParty
$ / shares
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| Debt Instrument [Line Items] |
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| Long-term debt |
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$ 92,809,000
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| ASU 2020-06 [Member] |
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| Debt Instrument [Line Items] |
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| Change in accounting principle accounting standards update adopted |
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true
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| Change in accounting principle accounting standards update adoption date |
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Jan. 01, 2021
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| Increase (decrease) in net debt |
$ 149,700,000
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| Decrease in net equity |
149,700,000
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| Convertible notes |
149,700,000
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| Non-cash interest expense |
17,100,000
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| Amortization of debt issuance costs |
1,100,000
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| 2019 Convertible Notes [Member] | ASU 2020-06 [Member] |
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| Debt Instrument [Line Items] |
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| Debt issuance costs |
2,400,000
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| Convertible notes |
74,900,000
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| 2020 Convertible Notes [Member] | ASU 2020-06 [Member] |
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| Debt Instrument [Line Items] |
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| Debt issuance costs |
2,300,000
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| Convertible notes |
$ 95,500,000
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| Capped Call Transactions [Member] |
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| Debt Instrument [Line Items] |
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| Number of counterparties | CounterParty |
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2
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| Initial conversion price | $ / shares |
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$ 39.4625
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| Initial cap price | $ / shares |
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$ 63.14
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| Convertible Senior Notes Due 2026 [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, stated percentage |
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3.50%
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| Debt instrument, due and payment description |
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The Convertible Notes are senior unsecured obligations of the Company and bear interest at a rate of 3.5% per year payable semiannually in arrears on March 15 and September 15 of each year, beginning on March 15, 2020.
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| Debt instrument, frequency of periodic payment |
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semiannually
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| Maturity date |
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Sep. 15, 2026
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| Threshold trading days | d |
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20
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| Threshold consecutive trading days | d |
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30
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| Threshold percentage of stock price trigger |
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130.00%
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| Redemption period, start date |
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Sep. 20, 2023
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| Redemption price, percentage |
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100.00%
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| Aggregate principal amount converted |
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$ 700,000
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| Aggregate principal amount converted into shares | shares |
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18,775
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| Debt interest expense |
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$ 895,000
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$ 1,825,000
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| Long-term debt |
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$ 92,809,000
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$ 92,736,000
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| Convertible Senior Notes Due 2026 [Member] | Prior to March 15, 2026 Convertible [Member] |
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| Debt Instrument [Line Items] |
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| Threshold trading days | d |
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20
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| Threshold consecutive trading days | d |
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30
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| Threshold percentage of stock price trigger |
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130.00%
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| Trading price per principal amount |
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$ 1,000
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| Convertible Senior Notes Due 2026 [Member] | Prior to March 15, 2026 Convertible [Member] | Maximum [Member] |
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| Debt Instrument [Line Items] |
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| Threshold percentage of stock price trigger |
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98.00%
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| Convertible Senior Notes Due 2026 [Member] | Common Stock [Member] |
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| Debt Instrument [Line Items] |
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| Terms of conversion |
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The Convertible Notes are convertible into shares of the Company’s common stock at an initial conversion rate of 25.3405 shares per $1,000 principal amount of Convertible Notes (equivalent to an initial conversion price of approximately $39.4625 per share of common stock).
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| Conversion ratio |
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0.0253405
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| Conversion price | $ / shares |
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$ 39.4625
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| Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] |
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| Debt Instrument [Line Items] |
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| Net proceeds from the sale of the notes |
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$ 212,900,000
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| Payment of convertible debt discounts and commissions |
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6,600,000
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| Payment of convertible debt offering expenses |
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500,000
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| Payments of transactions cost |
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28,400,000
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| Debt instrument effective interest rate |
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10.50%
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| Debt instrument convertible carrying amount of liability component |
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$ 145,100,000
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| Debt discount |
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74,900,000
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| Debt issuance costs |
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7,100,000
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| Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] | Exchange Agreements [Member] |
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| Debt Instrument [Line Items] |
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| Conversion ratio |
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0.0253405
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0.0253405
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| Debt issuance costs |
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$ 4,100,000
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$ 3,300,000
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| Increase (decrease) in net debt |
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$ (197,000,000.0)
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(122,800,000)
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| Aggregate principal amount converted |
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$ 126,100,000
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| Increase in shares outstanding | shares |
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5,992,217
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3,906,869
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| Shares issued | shares |
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5,097,166
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3,196,172
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| Additional shares issued | shares |
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895,051
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710,697
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| Additional shares issued for settlement of debt issuance cost paid | shares |
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78,419
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69,491
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78,419
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| Loss on conversion of debt |
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$ 61,100,000
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$ 39,500,000
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| Loss on conversion of debt related to additional shares issued |
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55,900,000
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36,400,000
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| Additional amount issued in payment of issuance costs |
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$ 5,200,000
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$ 3,100,000
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| Forfeiture of accrued interest in exchange of convertible notes |
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$ 1,700,000
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| Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] | Common Stock [Member] | Exchange Agreements [Member] |
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| Debt Instrument [Line Items] |
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| Aggregate principal amount converted into shares | shares |
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3,906,869
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| Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] | Liability Component [Member] |
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| Debt Instrument [Line Items] |
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| Debt issuance costs |
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4,700,000
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| Convertible Senior Notes Due 2026 [Member] | 2019 Convertible Notes [Member] | Equity Component [Member] |
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| Debt Instrument [Line Items] |
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| Debt issuance costs |
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$ 2,400,000
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| Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] |
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| Debt Instrument [Line Items] |
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| Net proceeds from the sale of the notes |
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$ 322,900,000
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| Payment of convertible debt discounts and commissions |
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5,700,000
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| Payment of convertible debt offering expenses |
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300,000
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| Payments of transactions cost |
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$ 43,100,000
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| Debt instrument effective interest rate |
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10.50%
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| Debt instrument convertible carrying amount of liability component |
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$ 204,500,000
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| Debt discount |
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95,500,000
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| Debt issuance costs |
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6,000,000.0
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| Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] | Exchange Agreements [Member] |
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| Debt Instrument [Line Items] |
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| Conversion ratio |
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0.0253405
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| Debt issuance costs |
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$ 1,300,000
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| Increase (decrease) in net debt |
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96,800,000
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| Aggregate principal amount converted |
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$ 98,100,000
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| Convertible notes held in treasury |
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$ 425,400,000
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| Shares issued | shares |
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2,485,548
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| Additional shares issued | shares |
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541,470
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| Additional shares issued for settlement of debt issuance cost paid | shares |
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46,132
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46,132
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| Loss on conversion of debt |
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$ 32,900,000
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| Loss on conversion of debt related to additional shares issued |
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30,400,000
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| Additional amount issued in payment of issuance costs |
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$ 2,500,000
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| Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] | Common Stock [Member] | Exchange Agreements [Member] |
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| Debt Instrument [Line Items] |
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| Aggregate principal amount converted into shares | shares |
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3,027,018
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5,992,217
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| Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] | Liability Component [Member] |
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| Debt Instrument [Line Items] |
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| Debt issuance costs |
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3,700,000
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| Convertible Senior Notes Due 2026 [Member] | 2020 Convertible Notes [Member] | Equity Component [Member] |
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| Debt Instrument [Line Items] |
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| Debt issuance costs |
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2,300,000
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| Convertible Senior Notes Due 2026 [Member] | 2019 and 2020 Convertible Notes [Member] | Exchange Agreements [Member] |
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| Debt Instrument [Line Items] |
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| Aggregate principal amount converted |
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$ 201,100,000
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| Forfeiture of accrued interest in exchange of convertible notes |
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$ 2,500,000
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| Convertible Senior Notes Due 2026 [Member] | Convertible Senior Notes [Member] | Exchange Agreements [Member] |
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| Debt Instrument [Line Items] |
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| Increase in shares outstanding | shares |
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3,027,018
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| Convertible Senior Notes Due 2026 [Member] | Private Offering [Member] | 2019 Convertible Notes [Member] |
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| Debt Instrument [Line Items] |
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| Principal amount |
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$ 220,000,000.0
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| Convertible Senior Notes Due 2026 [Member] | Private Offering [Member] | 2020 Convertible Notes [Member] |
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| Debt Instrument [Line Items] |
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| Principal amount |
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$ 300,000,000.0
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