Earnings Per Share - Computation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2022	Mar. 31, 2021
Composition of the weighted average common shares used in the basic and diluted earnings per share computation
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share	14,318,839			14,613,210			14,310,484	14,623,497
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share	14,318,839			14,613,210			14,310,484	14,623,497
Net income	$ 824	$ 1,175	$ 1,160	$ 1,067	$ 1,376	$ 670	$ 3,159	$ 3,113
Basic earnings per share	$ 0.06			$ 0.07			$ 0.22	$ 0.21
Diluted earnings per share	$ 0.06			$ 0.07			$ 0.22	$ 0.21