Note 2 - Warranty Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Balance at	$ 3,408	$ 2,662	$ 2,662
Additions charged to expense	4,018	2,588	3,185
Deductions for repairs and replacements	(2,606)	(1,802)	(2,439)
Balance at	$ 4,820	$ 3,448	$ 3,408