Quarterly Consolidated Financial Information (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Quarterly Consolidated Financial Information [Abstract]
Net sales	$ 17,858	$ 18,278	$ 17,837	$ 17,198	$ 14,924	$ 16,927	$ 16,589	$ 15,004	$ 71,171	$ 63,444	$ 60,297
Gross margin	10,707	10,248	9,956	9,502	8,482	10,000	9,543	8,812	40,413	36,837	34,737
Operating income (loss)	2,107	1,260	1,133	800	2,513	1,233	876	413	5,300	5,035	(2,046)
Net income	$ 15,600	$ 1,082	$ 1,089	$ 734	$ 2,313	$ 937	$ 673	$ 325	$ 18,505	$ 4,248	$ (2,887)
Net income per share-basic (in dollars per share)	$ 1.75	$ 0.12	$ 0.12	$ 0.08	$ 0.26	$ 0.11	$ 0.08	$ 0.04	$ 2.08	$ 0.49	$ (0.34)
Net income per share-diluted (in dollars per share)	$ 1.72	$ 0.12	$ 0.12	$ 0.08	$ 0.26	$ 0.11	$ 0.08	$ 0.04	$ 2.04	$ 0.48	$ (0.34)