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, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Accounting Policies [Abstract]
Number of antidilutive securities (in shares)									400	200
Numerator:
Net income	$ 2,992	$ 1,635	$ 317	$ 817	$ 84	$ 61	$ 283	$ 1,180	$ 5,761	$ 1,608	$ 6,106
Denominator:
Basic weighted-average common shares outstanding (in shares)									13,992	13,881	13,730
Effect of dilutive securities:
Stock awards and options (in shares)									144	237	735
Warrants (in shares)									0	0	66
Diluted weighted-average common shares outstanding (in shares)									14,136	14,118	14,531
Net income per share, basic (dollars per share)	$ 0.20	$ 0.12	$ 0.02	$ 0.06	$ 0.01	$ 0.00	$ 0.02	$ 0.09	$ 0.41	$ 0.12	$ 0.44
Net income per share, diluted (dollars per share)	$ 0.21	$ 0.12	$ 0.02	$ 0.06	$ 0.01	$ 0.00	$ 0.02	$ 0.08	$ 0.41	$ 0.11	$ 0.42