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STOCKHOLDERS' EQUITY - Stock Based Compensation (Details) - USD ($)	3 Months Ended					6 Months Ended			12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Restricted stock
Stock Based Compensation
Number of shares awarded						151,500	149,550
Number of shares forfeited		200				400
Number of shares vested		15,800				145,725	122,125
Number of shares outstanding		707,050		701,675		707,050	701,675		674,250	723,050	701,675	701,675
Vesting period						5 years
RSUs
Stock Based Compensation
Number of shares forfeited				51,907			51,907		2,750
Number of shares vested		73,750		24,343		73,750	24,343
Number of shares outstanding		150,052		148,776		150,052	148,776		225,026	223,802	223,802	225,026
RSUs | Awards granted in 2021
Stock Based Compensation
Number of shares issued under the Plan	80,700
Performance cycle	3 years
RSUs | Awards granted in 2020
Stock Based Compensation
Number of shares issued under the Plan			75,026
RSUs | Awards granted in 2019
Stock Based Compensation
Number of shares issued under the Plan					77,776
TSR awards
Stock Based Compensation
Percentage of RSUs to vest upon achievement of specified criteria						50.00%
ROC Awards
Stock Based Compensation
Percentage of RSUs to vest upon achievement of specified criteria						50.00%
2019 Incentive Plan
Stock Based Compensation
Maximum number of shares authorized for issuance		750,000				750,000
2019 Incentive Plan | Restricted stock and RSU grants
Stock Based Compensation
Number of shares outstanding		444,452				444,452
2019 Incentive Plan | Restricted stock
Stock Based Compensation
Number of shares outstanding		294,400				294,400
2019 Incentive Plan | RSUs
Stock Based Compensation
Number of shares outstanding		150,052				150,052
2016 Incentive Plan
Stock Based Compensation
Maximum number of shares authorized for issuance		0				0
2016 Incentive Plan | Restricted stock
Stock Based Compensation
Number of shares outstanding		412,650				412,650
2016 Incentive Plan | RSUs
Stock Based Compensation
Number of shares forfeited							51,907	2,500
Number of shares vested						73,750	24,343
Number of shares outstanding		76,250				76,250
Pay-for-performance program | RSUs
Stock Based Compensation
Number of shares forfeited		0				0
Number of shares vested		0				0
Vesting period						3 years
Pay-for-performance program | RSUs | Awards granted in 2020
Stock Based Compensation
Aggregate fair value of the shares granted		$ 962,000				$ 962,000
Pay-for-performance program | RSUs | Awards granted in 2019
Stock Based Compensation
Aggregate fair value of the shares granted		$ 1,446,000				$ 1,446,000

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Represents the total fair value of other than stock (or unit) option plans granted during the reporting period.

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