Note 5 - Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Accrued Expenses:
Compensation and benefits	$ 11,983	$ 11,614
Customer prepayments	1,053	1,324
Accrued sales commissions	2,792	1,982
Accrued warranty	5,069	3,408	$ 2,662
Other accrued expenses	4,444	3,798
Total Accrued Expenses	$ 25,341	$ 22,126