Note 1 - Basis of Presentation and Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) |
Sep. 30, 2016 |
Jun. 30, 2016 |
|---|---|---|
| Land [Member] | ||
| Property and equipment, cost | $ 6,270,000 | $ 6,270,000 |
| Building and Building Improvements [Member] | ||
| Property and equipment, cost | 157,675,000 | 157,963,000 |
| Machinery and Equipment [Member] | ||
| Property and equipment, cost | 93,710,000 | 82,018,000 |
| Property and equipment, cost | 251,385,000 | 246,251,000 |
| Accumulated depreciation and amortization | (117,580,000) | (113,889,000) |
| Property and equipment, net | $ 133,805,000 | $ 132,362,000 |