Summary of Significant Accounting Policies - Summary of Computation of Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net income	$ 1,635	$ 61	$ 2,769	$ 1,524
Weighted-average shares outstanding:
Basic weighted-average common shares outstanding (in shares)	14,006	13,915	13,975	13,858
Effect of dilutive securities:
Stock awards and options (in shares)	172	190	161	264
Diluted weighted-average common shares outstanding (in shares)	14,178	14,105	14,136	14,122
Net income per share, basic (USD per share)	$ 0.12	$ 0.00	$ 0.20	$ 0.11
Net income per share, diluted (USD per share)	$ 0.12	$ 0.00	$ 0.20	$ 0.11