Note 5 - Accrued Expenses (Details) - Accrued Expenses - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Accrued Expenses:
Compensation and benefits	$ 11,614	$ 7,134
Customer prepayments	1,324	1,473
Accrued sales commissions	1,982	1,814
Accrued warranty	3,408	2,662	$ 1,424
Other accrued expenses	3,798	2,548
Total Accrued Expenses	$ 22,126	$ 15,631