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, 2023	Jun. 30, 2022	Jun. 30, 2021
Nature of Business and Summary of Significant Accounting Policies
Basic EPS	$ 27,127	$ 19,599	$ 15,413
Diluted EPS	$ 27,127	$ 19,599	$ 15,413
Weighted average
Basic (in shares)	36,741,000	36,725,000	36,696,000
Stock Options	264,000	142,000	112,000
Diluted (in shares)	37,005,000	36,867,000	36,808,000
Effect of Dilutive Securities:
Basic (in dollars per share)	$ 0.74	$ 0.53	$ 0.42
Stock Options (in dollars per share)	(0.01)
Diluted (in dollars per share)	$ 0.73	$ 0.53	$ 0.42
Excluded from diluted EPS	7,534	214,109	40,000