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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share - (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Basic Numerator: Net income available to common stockholders | $ 4,106 | $ 2,047
Basic Denominator: Weighted average shares outstanding | 6,408 | 6,545
Basic income per common share | $ 0.64 | $ 0.31
Common Class C [Member] |  |
Basic Numerator: Net income available to common stockholders | $ 64 | $ 32
Basic Denominator: Weighted average shares outstanding | 383 | 383
Basic income per common share | $ 0.17 | $ 0.08
Diluted Denominator: Weighted average shares outstanding | 383 | 383
Convertible Class C Stock |  |
Total Denominator for Diluted Earnings Per Share | 383 | 383
Diluted Income per Common Share | $ 0.17 | $ 0.08
Common Stock [Member] |  |
Basic Numerator: Net income available to common stockholders | $ 3,855 | $ 1,923
Basic Denominator: Weighted average shares outstanding | 6,408 | 6,545
Basic income per common share | $ 0.60 | $ 0.29
Diluted Denominator: Weighted average shares outstanding | 6,408 | 6,545
Convertible Class C Stock | 128 | 128
Total Denominator for Diluted Earnings Per Share | 6,536 | 6,673
Diluted Income per Common Share | $ 0.59 | $ 0.29

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