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			6 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Net income	$ 4,303	$ 1,761	$ 829	$ 6,064	$ 1,740
Denominator:
Basic weighted-average common shares outstanding (in shares)	13,902		13,944	13,908	13,996
Effect of dilutive securities:
Stock awards and options (in shares)	660		1,019	607	1,000
Diluted weighted-average common shares outstanding (in shares)	14,562		14,963	14,515	14,996
Net income per share, basic (USD per share)	$ 0.31		$ 0.06	$ 0.44	$ 0.12
Net income per share, diluted (USD per share)	$ 0.30		$ 0.06	$ 0.42	$ 0.12