Nature of Business and Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Nature of Business and Summary of Significant Accounting Policies
Basic EPS	$ 8,520	$ 12,223
Weighted Average Shares, Basic EPS	18,444,000	18,574,000
Stock Options	49,000	50,000
Diluted EPS	$ 8,520	$ 12,223
Weighted Average Shares, Diluted EPS	18,493,000	18,624,000
Net Income Per Share, Basic	$ 0.46	$ 0.66
Net Income Per Share, Diluted	$ 0.46	$ 0.66