Note 6 - Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014
Accrued Expenses:
Compensation and benefits	$ 11,060	$ 11,614
Customer prepayments	1,014	1,324
Accrued sales commissions	2,058	1,982
Accrued warranty	4,820	3,408	$ 3,448	$ 2,662
Other accrued expenses	2,735	3,798
Total Accrued Expenses	$ 21,687	$ 22,126