Quarterly Consolidated Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Effect of Fourth Quarter Events [Line Items]
Net sales	$ 17,443	$ 15,456	$ 14,899	$ 13,351	$ 13,813	$ 17,110	$ 15,996	$ 17,540	$ 61,149	$ 64,459	$ 71,171
Gross margin	11,064	7,959	9,376	7,857	7,800	10,085	8,807	9,698	36,256	36,390	40,413
Operating income (loss)	1,249	(1,910)	(358)	2,964	(654)	1,563	(563)	849	1,945	1,195	5,300
Net income (loss)	$ (12,861)	$ (1,176)	$ (283)	$ 3,207	$ (881)	$ 848	$ (543)	$ 387	$ (11,113)	$ (189)	$ 18,505
Net income (loss) per share - basic (in dollars per share)	$ (1.40)	$ (0.13)	$ (0.03)	$ 0.35	$ (0.10)	$ 0.09	$ (0.06)	$ 0.04	$ (1.21)	$ (0.02)	$ 2.08
Net income (loss) per share - diluted (in dollars per share)	$ (1.40)	$ (0.13)	$ (0.03)	$ 0.35	$ (0.10)	$ 0.09	$ (0.06)	$ 0.04	$ (1.21)	$ (0.02)	$ 2.04