Quarterly Financial Data (Unaudited) - Financial Data (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 Financial Information Disclosure [Abstract]
Net sales	$ 130,197	$ 125,525	$ 143,129	$ 129,529	$ 129,744	$ 127,279	$ 136,699	$ 120,147	$ 528,380	$ 513,869	$ 498,701
Gross profit	45,483	48,052	54,374	48,005	45,995	47,446	48,594	43,141	195,914	185,176	166,392
(Loss) income from operations	2,327	(2,075)	5,650	3,014	(2,650)	691	536	1,794	8,916	372	(21,846)
Net loss	$ 3,111	$ 2,506	$ 4,709	$ 1,806	$ (2,978)	$ (1,306)	$ (7,157)	$ 2,979	$ 12,132	$ (8,462)	$ (26,576)
Net income (loss) per common share - basic (in US$ per share)	$ 0.19	$ 0.16	$ 0.29	$ 0.11	$ (0.19)	$ (0.08)	$ (0.46)	$ 0.19	$ 0.76	$ (0.54)	$ (1.72)
Net income (loss) per common share - diluted (in US$ per share)	$ 0.19	$ 0.16	$ 0.29	$ 0.11	$ (0.19)	$ (0.08)	$ (0.46)	$ 0.19	$ 0.76	$ (0.54)	$ (1.72)