Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 59,152	$ 55,587	$ 52,628	$ 49,676	$ 52,919	$ 52,144	$ 50,043	$ 49,800	$ 217,043	$ 204,906	$ 178,184
Gross profit	48,338	45,618	43,129	40,474	43,246	41,005	40,880	40,334	177,559	165,465	142,763
Net income (loss)	$ 3,737	$ 365	$ (413)	$ (1,977)	$ 772	$ (1,749)	$ 1,043	$ (1,858)	$ 1,712	$ (1,792)	$ (56,024)
Earnings per common share — basic	$ 0.11	$ 0.01	$ (0.01)	$ (0.06)	$ 0.02	$ (0.05)	$ 0.03	$ (0.06)	$ 0.05	$ (0.06)	$ (1.72)
Earnings per common share — diluted	$ 0.11	$ 0.01	$ (0.01)	$ (0.06)	$ 0.02	$ (0.05)	$ 0.03	$ (0.06)	$ 0.05	$ (0.06)	$ (1.72)