Note 6 - Accrued Expenses - Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015
Accrued Expenses:
Compensation and benefits	$ 7,540	$ 11,983
Customer prepayments	1,227	1,053
Accrued sales commissions	2,275	2,792
Accrued warranty	7,534	5,069	$ 4,820	$ 3,408
Other accrued expenses	5,304	4,444
Total Accrued Expenses	$ 23,880	$ 25,341