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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Cumulative-effect adjustment for adoption of ASC 842 | Common Stock | Treasury Stock | Additional Paid-In Capital | Accumulated Deficit | Accumulated Deficit Cumulative-effect adjustment for adoption of ASC 842
--- | --- | --- | --- | --- | --- | --- | ---
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201602Member |  |  |  |  |  |
Beginning Balance (in shares) at Sep. 30, 2019 |  |  | 12,036,000 | 0 |  |  |
Beginning Balance at Sep. 30, 2019 | $ 45,571 | $ (2) | $ 12 | $ 0 | $ 85,114 | $ (39,555) | $ (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Expense related to director restricted stock unit (in shares) |  |  | 90,000 |  |  |  |
Expense related to director restricted stock unit | 260 |  |  |  | 260 |  |
Expense related to employee stock-based compensation | 306 |  |  |  | 306 |  |
Repurchases of common stock (in shares) |  |  |  | 28,000 |  |  |
Repurchases of common stock | (113) |  |  | $ (113) |  |  |
Cancellation of common stock (in shares) |  |  | (117,000) | (28,000) |  |  |
Cancellation of common stock | (98) |  |  | $ 113 | (211) |  |
Exercise of stock options (in shares) |  |  | 345,000 |  |  |  |
Exercise of stock options | 27 |  |  |  | 27 |  |
Net income | 5,752 |  |  |  |  | 5,752 |
Ending Balance (in shares) at Jun. 30, 2020 |  |  | 12,354,000 | 0 |  |  |
Ending Balance at Jun. 30, 2020 | 51,703 |  | $ 12 | $ 0 | 85,496 | (33,805) |
Beginning Balance (in shares) at Mar. 31, 2020 |  |  | 12,354,000 | 0 |  |  |
Beginning Balance at Mar. 31, 2020 | 49,397 |  | $ 12 | $ 0 | 85,314 | (35,929) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Expense related to director restricted stock unit | 87 |  |  |  | 87 |  |
Expense related to employee stock-based compensation | 95 |  |  |  | 95 |  |
Net income | 2,124 |  |  |  |  | 2,124 |
Ending Balance (in shares) at Jun. 30, 2020 |  |  | 12,354,000 | 0 |  |  |
Ending Balance at Jun. 30, 2020 | $ 51,703 |  | $ 12 | $ 0 | 85,496 | (33,805) |
Beginning Balance (in shares) at Sep. 30, 2020 | 12,404,000 |  | 12,404,000 | 0 |  |  |
Beginning Balance at Sep. 30, 2020 | $ 53,437 |  | $ 12 | $ 0 | 85,868 | (32,443) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Expense related to director restricted stock unit (in shares) |  |  | 78,000 |  |  |  |
Expense related to director restricted stock unit | 349 |  |  |  | 349 |  |
Expense related to employee stock-based compensation | $ 968 |  |  |  | 968 |  |
Exercise of stock options (in shares) | 63,000 |  | 63,000 |  |  |  |
Exercise of stock options | $ 231 |  | $ 1 |  | 230 |  |
Net income | $ 7,261 |  |  |  |  | 7,261 |
Ending Balance (in shares) at Jun. 30, 2021 | 12,545,000 |  | 12,545,000 | 0 |  |  |
Ending Balance at Jun. 30, 2021 | $ 62,246 |  | $ 13 | $ 0 | 87,415 | (25,182) |
Beginning Balance (in shares) at Mar. 31, 2021 |  |  | 12,545,000 | 0 |  |  |
Beginning Balance at Mar. 31, 2021 | 58,893 |  | $ 13 | $ 0 | 86,942 | (28,062) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Expense related to director restricted stock unit | 117 |  |  |  | 117 |  |
Expense related to employee stock-based compensation | 356 |  |  |  | 356 |  |
Exercise of stock options | 0 |  |  |  |  |  |
Net income | $ 2,880 |  |  |  |  | 2,880 |
Ending Balance (in shares) at Jun. 30, 2021 | 12,545,000 |  | 12,545,000 | 0 |  |  |
Ending Balance at Jun. 30, 2021 | $ 62,246 |  | $ 13 | $ 0 | $ 87,415 | $ (25,182) |

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