Note 7 - Commitments and Contingencies (Details Textual) $ in Millions |
3 Months Ended | 9 Months Ended | 42 Months Ended | ||||
|---|---|---|---|---|---|---|---|
Jul. 01, 2023 |
Mar. 31, 2024
USD ($)
|
Mar. 31, 2023
USD ($)
|
Mar. 31, 2024 |
Jun. 30, 2023 |
Jan. 01, 2021 |
Dec. 31, 2020 |
|
| Number of Operating Leases | 1 | ||||||
| Lessee, Operating Lease, Term of Contract (Year) | 4 years 5 months 1 day | ||||||
| Lessee, Operating Lease, Discount Rate | 6.25% | ||||||
| Lessee, Operating Lease, Remaining Lease Term (Year) | 1 year 7 months 28 days | 1 year 7 months 28 days | |||||
| Operating Lease, Payments | $ 0.3 | $ 0.3 | |||||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 4.00% | 4.00% | |||||
| Defined Contribution Plan, Cost | $ 0.1 | $ 0.1 | |||||
| Maximum [Member] | |||||||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 6.00% | ||||||