Note 2 - Summary of Significant Accounting Policies (Details) - Warranty Liabilities - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015
Warranty Liabilities [Abstract]
Balance at beginning of the period	$ 3,408	$ 2,662	$ 2,662
Additions charged to expense	877	881	3,185
Deductions for repairs and replacements	(615)	(552)	(2,439)
Balance at end of the period	$ 3,670	$ 2,991	$ 3,408