Nature of Business and Summary of Significant Accounting Policies - Net Income per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Nature of Business and Summary of Significant Accounting Policies
Basic EPS	$ 1,037	$ 3,197	$ 8,789	$ 5,516
Diluted EPS	$ 1,037	$ 3,197	$ 8,789	$ 5,516
Weighted average
Basic (in shares)	36,728,000	36,695,000	36,720,000	36,695,000
Stock Options	170,000	110,000	157,000	99,000
Diluted (in shares)	36,898,000	36,805,000	36,877,000	36,794,000
Effect of Dilutive Securities:
Basic (in dollars per share)	$ 0.03	$ 0.09	$ 0.24	$ 0.15
Diluted (in dollars per share)	$ 0.03	$ 0.09	$ 0.24	$ 0.15
Excluded from diluted EPS	80,435	64,000	40,217	72,000