Note 6 - Accrued Expenses - Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015
Accrued Expenses:
Compensation and benefits	$ 6,554	$ 11,983
Customer prepayments	1,321	1,053
Accrued sales commissions	1,924	2,792
Accrued warranty	5,348	5,069	$ 3,670	$ 3,408
Other accrued expenses	5,359	4,444
Total Accrued Expenses	$ 20,506	$ 25,341