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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities:          
Net income (loss) $ (8,515) $ 4,645 $ (5,675) $ (6,754) $ (12,766)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:          
Non-controlling interest 11 (3) 35 2 (5)
Gain on bargain purchase (7,234) (9,034)
Inventory reserve 59 2 1,500 149 (22)
Stock-based compensation expense 1,028 832 3,908 4,343 4,676
Depreciation and amortization 1,943 2,290 9,445 8,262 8,553
Right-of-use assets, non-cash lease expense 763 658 2,814 2,756 2,908
Bad debt expense 970 428 1,767 66 997
Deferred income taxes 97 372 (6) 708 1,888
Other non-cash items (112) 46 103 707 305
Changes in:          
Accounts receivable 746 824 (1,460) (1,368) (9,549)
Inventory 726 (237) (1,743) (4,473) (5,943)
Prepaid expenses and other assets (1,440) (85) 791 (816) (2,860)
Deferred costs 41 239 679 1,608 2,990
Deferred revenue 112 (3) (295) (627) (1,767)
Accounts payable and accrued expenses 4,021 (325) 4,440 (533) 8,140
Lease liabilities (694) (694) (2,851) (2,739) (2,790)
Accrued severance payable, net 36 (21) (42) (145)
Net cash provided by (used in) operating activities (208) 1,755 4,397 1,249 (5,390)
Cash flows from investing activities:          
Acquisitions, net of cash assumed 8,722 8,722
Purchase of investments (100) (100) (100)
Capitalized software development costs (591) (680) (3,629) (2,219) (627)
Capital expenditures (1,309) (1,100) (3,464) (4,011) (2,400)
Net cash provided by (used in) investing activities (1,900) 6,842 1,529 (6,330) (3,027)
Cash flows from financing activities:          
Net proceeds from stock offering 26,867
Proceeds from long-term debt, net of debt costs 113,919
Repayment of long-term debt (11,037) (1,329) (4,408) (5,659) (5,571)
Short-term bank debt, net (10,030) (1) 4,321 5,709 (270)
Purchase of treasury stock upon vesting of restricted stock (31) (44) (141) (211) (794)
Repayment of financing lease (129) (121) (138)
Payment of preferred stock dividend (3,385) (4,112)
Proceeds from exercise of stock options, net 36 229
Net cash (used in) provided by financing activities 92,821 (1,374) (3,706) (282) 16,211
Effect of foreign exchange rate changes on cash and cash equivalents (381) (123) (877) (3,408) 531
Net increase (decrease) in cash, cash equivalents and restricted cash 90,332 7,100 1,343 (8,771) 8,325
Cash, cash equivalents, and restricted cash, beginning of year 19,332 17,989 17,989 26,760 18,435
Cash, cash equivalents, and restricted cash, end of year 109,664 25,089 19,332 17,989 26,760
Reconciliation of cash, cash equivalents, and restricted cash, beginning of year          
Cash and cash equivalents 19,022 17,680 17,680 26,452 18,127
Restricted cash 310 309 309 308 308
Reconciliation of cash, cash equivalents, and restricted cash, end of year          
Cash and cash equivalents 24,354 24,780 19,022 17,680 26,452
Restricted cash 85,310 309 310 309 308
Cash paid for:          
Taxes 262 5 175 63 58
Interest 447 383 1,656 1,308 1,474
Noncash investing and financing activities:          
Issuance of derivative on long-term debt 2,226
Value of shares withheld pursuant to exercise of stock options 647
Value of warrant issued in connection with Movingdots acquisition 1,347 1,347
Value of licensed intellectual property acquired in connection with Movingdots acquisition 1,517
Preferred stock dividends paid in shares $ 1,108 $ 4,231