SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share - (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Basic Numerator: Net income available to common stockholders	$ 2,291	$ 3,868	$ 10,198	$ 9,487
Basic Denominator: Weighted average shares outstanding	6,554	6,554	6,554	6,489
Basic income per common share	$ 0.35	$ 0.59	$ 1.56	$ 1.46
Total Denominator for diluted earnings per share	6,682	6,682	6,682	6,617
Diluted income per common share	$ 0.32	$ 0.54	$ 1.43	$ 1.35
Common Stock [Member]
Basic Numerator: Net income available to common stockholders	$ 2,153	$ 3,634	$ 9,583	$ 8,915
Basic Denominator: Weighted average shares outstanding	6,554	6,554	6,554	6,489
Basic income per common share	$ 0.33	$ 0.55	$ 1.46	$ 1.37
Diluted Denominator: Weighted average shares outstanding	6,554	6,554	6,554	6,489
Convertible Class C Stock	128	128	128	128
Total Denominator for diluted earnings per share	6,682	6,682	6,682	6,617
Diluted income per common share	$ 0.32	$ 0.54	$ 1.43	$ 1.35
Common Class C [Member]
Basic Numerator: Net income available to common stockholders	$ 35	$ 60	$ 157	$ 146
Basic Denominator: Weighted average shares outstanding	383	383	383	383
Basic income per common share	$ 0.09	$ 0.16	$ 0.41	$ 0.38
Diluted Denominator: Weighted average shares outstanding	383	383	383	383
Convertible Class C Stock
Total Denominator for diluted earnings per share	383	383	383	383
Diluted income per common share	$ 0.09	$ 0.16	$ 0.41	$ 0.38