Nature of Business and Summary of Significant Accounting Policies - Net Income per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Nature of Business and Summary of Significant Accounting Policies
Diluted EPS	$ 15,413	$ 7,795	$ 12,481
Weighted average
Basic (in shares)	36,696,000	36,888,000	37,148,000
Stock Options	112,000	98,000	100,000
Diluted (in shares)	36,808,000	36,986,000	37,248,000
Effect of Dilutive Securities:
Basic (in dollars per share)	$ 0.42	$ 0.21	$ 0.34
Diluted (in dollars per share)	$ 0.42	$ 0.21	$ 0.34