Note 2 - Property, Equipment, and Leases (Details Textual) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Sep. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Revenue Equipment Under Capital Leases [Member] | ||||
| Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation | $ 50.9 | $ 50.9 | $ 54.8 | |
| Tractors [Member] | ||||
| Property, Plant and Equipment, Useful Life | 3 years | 4 years | ||
| Trailers [Member] | ||||
| Property, Plant and Equipment, Useful Life | 7 years | 10 years | ||
| Depreciation Expense [Member] | ||||
| New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results | 7.0 | |||
| New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | $ 4.5 | |||
| New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Basic and Diluted Earnings Per Share | $ 0.16 |