Note 6 - Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Jun. 30, 2015
Accrued Expenses:
Compensation and benefits	$ 11,097	$ 11,614
Customer prepayments	1,762	1,324
Accrued sales commissions	2,021	1,982
Accrued warranty	4,310	3,408
Other accrued expenses	4,117	3,798
Total Accrued Expenses	$ 23,307	$ 22,126