Note 2 - Summary of Significant Accounting Policies - Warranty Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Balance at beginning of the period	$ 5,069	$ 3,408	$ 3,408
Additions charged to expense	3,841	4,018	5,069
Addition from acquisition	907
Deductions for repairs and Replacements	(2,283)	(2,606)	(3,408)
Balance at end of the period	$ 7,534	$ 4,820	$ 5,069