Note 2 - Warranty Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015
Balance at	$ 3,408	$ 2,662	$ 2,662
Additions charged to expense	2,259	1,557	3,185
Deductions for repairs and replacements	(1,357)	(971)	(2,439)
Balance at	$ 4,310	$ 3,248	$ 3,408