Summary of Significant Accounting Policies - Revision of Statement of Operations and Comprehensive Income (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Statement of Operations and Comprehensive Income:
Income tax expense									$ (1,302)	$ (2,578)	$ (3,528)
Net income	$ 84	$ 61	$ 283	$ 1,180	$ 2,437	$ 1,003	$ 1,600	$ 1,066	$ 1,608	$ 6,106	$ 7,125
Net income per share:
Net income per share, basic (dollars per share)	$ 0.01	$ 0.00	$ 0.02	$ 0.09	$ 0.18	$ 0.07	$ 0.12	$ 0.08	$ 0.12	$ 0.44	$ 0.51
Net income per share, diluted (dollars per share)	$ 0.01	$ 0.00	$ 0.02	$ 0.08	$ 0.17	$ 0.07	$ 0.11	$ 0.08	$ 0.11	$ 0.42	$ 0.50
Foreign currency translation adjustment									$ (87)	$ 244	$ (135)
Other comprehensive income (loss), net of tax									(87)	244	(135)
Comprehensive income									$ 1,521	6,350	6,990
As Reported
Statement of Operations and Comprehensive Income:
Income tax expense										(2,665)	(3,666)
Net income										$ 6,019	$ 6,987
Net income per share:
Net income per share, basic (dollars per share)										$ 0.44	$ 0.50
Net income per share, diluted (dollars per share)										$ 0.41	$ 0.49
Foreign currency translation adjustment										$ 294
Other comprehensive income (loss), net of tax										294
Comprehensive income										6,313	$ 6,852
Adjustments
Statement of Operations and Comprehensive Income:
Income tax expense										87	138
Net income										87	138
Net income per share:
Foreign currency translation adjustment										(50)
Other comprehensive income (loss), net of tax										(50)
Comprehensive income										$ 37	$ 138