Summary of Significant Accounting Policies - Reconciliation of Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Accounting Policies [Abstract]
Number of antidilutive securities (in shares)									200	400	200
Numerator:
Net income	$ 3,907	$ 1,782	$ 829	$ 911	$ 2,992	$ 1,635	$ 317	$ 817	$ 7,429	$ 5,761	$ 1,608
Denominator:
Basic weighted-average common shares outstanding (in shares)									14,055	13,992	13,881
Effect of dilutive securities:
Stock awards and options (in shares)									925	144	237
Diluted weighted-average common shares outstanding (in shares)									14,980	14,136	14,118
Income per share, basic (dollars per share)	$ 0.27	$ 0.13	$ 0.06	$ 0.07	$ 0.20	$ 0.12	$ 0.02	$ 0.06	$ 0.53	$ 0.41	$ 0.12
Income per share, diluted (dollars per share)	$ 0.26	$ 0.12	$ 0.06	$ 0.06	$ 0.21	$ 0.12	$ 0.02	$ 0.06	$ 0.50	$ 0.41	$ 0.11