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EMPLOYEE STOCK PLANS - Non-Vested Options (Details) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended
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Jan. 11, 2023 item $ / shares shares | Sep. 14, 2022 shares | Jan. 12, 2022 item $ / shares shares | May 31, 2023 USD ($) $ / shares shares | May 31, 2022 USD ($) $ / shares shares | May 31, 2023 USD ($) $ / shares shares | May 31, 2022 USD ($) $ / shares shares
Stock Options [Abstract] |  |  |  |  |  |  |
Share-based compensation expense | $ |  |  |  |  |  | $ 559 | $ 491
Employees [Member] |  |  |  |  |  |  |
Stock Options [Abstract] |  |  |  |  |  |  |
Restricted shares |  | 6,000 |  |  |  |  |
Employees [Member] | Vesting at grant date |  |  |  |  |  |  |
Stock Options [Abstract] |  |  |  |  |  |  |
Vesting rights percentage |  | 20.00% |  |  |  |  |
Employees [Member] | Vesting at anniversary |  |  |  |  |  |  |
Stock Options [Abstract] |  |  |  |  |  |  |
Vesting rights percentage |  | 20.00% |  |  |  |  |
Vesting period |  | 4 years |  |  |  |  |
2014 Equity Plan [Member] |  |  |  |  |  |  |
Stock Options [Abstract] |  |  |  |  |  |  |
Share-based compensation expense | $ |  |  |  | $ 100 | $ 100 | 600 | 500
Unrecognized compensation expenses | $ |  |  |  | $ 500 |  | $ 500 |
Weighted-average period for options expected to vest |  |  |  |  |  | 2 years |
2014 Equity Plan [Member] | Non-Employee Board Members [Member] |  |  |  |  |  |  |
Number of Options [Roll Forward] |  |  |  |  |  |  |
Granted (in shares) | 3,033 |  | 2,000 |  |  |  |
Stock Options [Abstract] |  |  |  |  |  |  |
Number of Board Members | item | 6 |  | 6 |  |  |  |
Stock price (in dollars per share) | $ / shares | $ 9.89 |  | $ 13.23 |  |  |  |
Share-based compensation expense | $ |  |  |  |  |  | $ 200 | $ 200
2014 Equity Plan [Member] | Executive Officer [Member] |  |  |  |  |  |  |
Stock Options [Abstract] |  |  |  |  |  |  |
Restricted shares | 50,000 |  |  |  |  |  |
2014 Equity Plan [Member] | Executive Officer [Member] | Vesting at grant date |  |  |  |  |  |  |
Stock Options [Abstract] |  |  |  |  |  |  |
Vesting rights percentage | 20.00% |  |  |  |  |  |
2014 Equity Plan [Member] | Executive Officer [Member] | Vesting at anniversary |  |  |  |  |  |  |
Stock Options [Abstract] |  |  |  |  |  |  |
Vesting rights percentage | 20.00% |  |  |  |  |  |
Vesting period | 4 years |  |  |  |  |  |
2004 Incentive Plan and 2014 Equity Plan [Member] |  |  |  |  |  |  |
Number of Options [Roll Forward] |  |  |  |  |  |  |
Non-vested options outstanding, beginning of period (in shares) |  |  |  |  |  | 232,998 | 218,333
Granted (in shares) |  |  |  |  |  |  | 105,000
Vested (in shares) |  |  |  |  |  | (101,998) | (87,002)
Forfeited (in shares) |  |  |  |  |  |  | (3,333)
Non-vested options outstanding, end of period (in shares) |  |  |  | 131,000 | 232,998 | 131,000 | 232,998
Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |  |  |
Non-vested options outstanding, beginning of period (in dollars per share) | $ / shares |  |  |  |  |  | $ 4.47 | $ 4.04
Granted (in dollars per share) | $ / shares |  |  |  |  |  |  | 5.16
Vested (in dollars per share) | $ / shares |  |  |  |  |  | 4.40 | 4.21
Forfeited (in dollars per share) | $ / shares |  |  |  |  |  |  | 4.21
Non-vested options outstanding, end of period (in dollars per share) | $ / shares |  |  |  | $ 4.54 | $ 4.47 | $ 4.54 | $ 4.47

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