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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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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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