CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Common Stock Previously Reported	Common Stock	Additional Paid-in Capital Previously Reported	Additional Paid-in Capital	Treasury Stock Previously Reported	Treasury Stock	Retained Earnings Previously Reported	Retained Earnings Revision of Prior Period, Adjustment	Retained Earnings	Previously Reported	Revision of Prior Period, Adjustment	Total
Balance at Jun. 30, 2018	$ 212	$ 396	$ 16,890	$ 16,890	$ (13,069)	$ (13,069)	$ 59,420	$ (894)	$ 58,342	$ 63,453	$ (894)	$ 62,559
Balance (in shares) at Jun. 30, 2018	21,204,327	39,514,939			(2,475,245)	(2,475,245)
Repurchase of treasury shares						$ (3,998)						(3,998)
Repurchase of treasury shares (in shares)						(274,065)
Stock options exercised				53								53
Stock options exercised (in shares)		45,534
Stock-based compensation expense				160								160
Net income									12,481			12,481
Balance (Implementation of ASC 606) at Jun. 30, 2019									(719)			(719)
Balance at Jun. 30, 2019		$ 396		17,103		$ (17,067)			70,104			70,536
Balance (in shares) at Jun. 30, 2019		39,560,473				(2,749,310)
Repurchase of treasury shares						$ (2,454)						(2,454)
Repurchase of treasury shares (in shares)						(144,405)
Stock options exercised				80								80
Stock options exercised (in shares)		27,944
Stock-based compensation expense				583								583
Net income									7,795			7,795
Balance at Jun. 30, 2020		$ 396		17,766		$ (19,521)			77,899			76,540
Balance (in shares) at Jun. 30, 2020		39,588,417				(2,893,715)
Stock options exercised
Stock options exercised (in shares)		7,466
Stock-based compensation expense				435								435
Net income									15,413	$ 14,901		15,413
Balance at Jun. 30, 2021		$ 396		$ 18,201		$ (19,521)			$ 93,312			$ 92,388
Balance (in shares) at Jun. 30, 2021		39,595,883				(2,893,715)