Note 9 - Commitments and Contingencies (Details Textual) - USD ($) |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 01, 2023 |
|---|---|---|---|
| Lessee, Operating Lease, Liability, to be Paid | $ 698,000 | ||
| Auto Liability Claim [Member] | Minimum [Member] | |||
| Liability Claim, Amount | 10,000,000 | $ 10,000,000 | |
| Auto Liability Claim [Member] | Maximum [Member] | |||
| Liability Claim, Amount | 20,000,000 | 20,000,000 | |
| Auto Liability Claim [Member] | Uninsured Risk [Member] | |||
| Loss Contingency Range Possible Loss Per Claim | 3,000,000 | 2,000,000 | $ 1,000,000 |
| Claim Limit, Aggregate Cost | 5,000,000 | $ 5,000,000 | |
| Workers Compensation Liability Claim [Member] | Uninsured Risk [Member] | |||
| Loss Contingency Range Possible Loss Per Claim | 750,000 | ||
| Capital Addition Purchase Commitments [Member] | Revenue Equipment [Member] | |||
| Purchase Obligation, to be Paid, Remainder of Fiscal Year | $ 64,300,000 |