Nature of Business and Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Nature of Business and Summary of Significant Accounting Policies
Basic EPS	$ 12,223	$ 7,649
Weighted Average Shares, Basic EPS	18,574,000	18,788,000
Stock Options	50,000	37,000
Diluted EPS	$ 12,223	$ 7,649
Weighted Average Shares, Diluted EPS	18,624,000	18,825,000
Net Income Per Share, Basic	$ 0.66	$ 0.41
Net Income Per Share, Diluted	$ 0.66	$ 0.41