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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Basic Numerator: Net income available to common stockholders	$ 3,860	$ 2,291	$ 8,139	$ 10,198
Basic Denominator: Weighted average shares outstanding	6,481	6,554	6,487	6,554
Basic income per common share	$ 0.60	$ 0.35	$ 1.25	$ 1.56
Diluted Income per Common Share	$ 0.55	$ 0.32	$ 1.16	$ 1.43
Common Class C [Member]
Basic Numerator: Net income available to common stockholders	$ 59	$ 35	$ 125	$ 157
Basic Denominator: Weighted average shares outstanding	383	383	383	383
Basic income per common share	$ 0.16	$ 0.09	$ 0.33	$ 0.41
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	$ 0.16	$ 0.09	$ 0.33	$ 0.41
Common Stock [Member]
Basic Numerator: Net income available to common stockholders	$ 3,627	$ 2,153	$ 7,647	$ 9,583
Basic Denominator: Weighted average shares outstanding	6,481	6,554	6,487	6,554
Basic income per common share	$ 0.56	$ 0.33	$ 1.18	$ 1.46
Diluted Denominator: Weighted average shares outstanding	6,481	6,554	6,487	6,554
Convertible Class C Stock	128	128	128	128
Total Denominator for Diluted Earnings Per Share	6,609	6,682	6,615	6,682
Diluted Income per Common Share	$ 0.55	$ 0.32	$ 1.16	$ 1.43