Interim Financial Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Summary of selected quarterly financial information
Revenue, net	$ 50,943	$ 50,004	$ 52,189	$ 53,224	$ 54,777	$ 51,570	$ 59,007	$ 54,827	$ 206,360	$ 220,181	$ 232,915
Gross profit	41,611	40,347	42,512	43,793	44,995	42,752	48,818	45,429	168,263	181,994	194,951
Net income	$ (1,416)	$ 1,141	$ 79	$ 3,316	$ 4,907	$ 1,724	$ 3,812	$ 2,451	$ 3,120	$ 12,894	$ 11,549
Per common share:
Income per share, basic (dollars per share)	$ (0.11)	$ 0.09	$ 0.01	$ 0.25	$ 0.36	$ 0.12	$ 0.27	$ 0.17	$ 0.24	$ 0.92	$ 0.82
Income per share, diluted (dollars per share)	$ (0.11)	$ 0.09	$ 0.01	$ 0.25	$ 0.35	$ 0.12	$ 0.26	$ 0.17	$ 0.24	$ 0.90	$ 0.79