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, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income	$ 1,782	$ 829	$ 911	$ 1,635	$ 3,522	$ 2,769
Denominator:
Basic weighted-average common shares outstanding (in shares)	14,165			14,006	14,027	13,975
Effect of dilutive securities:
Stock awards and options (in shares)	1,121			172	951	161
Diluted weighted-average common shares outstanding (in shares)	15,286			14,178	14,978	14,136
Net income per share, basic (USD per share)	$ 0.13			$ 0.12	$ 0.25	$ 0.20
Net income per share, diluted (USD per share)	$ 0.12			$ 0.12	$ 0.24	$ 0.20