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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ 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 | 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 |  |  |  |
Expense related to director restricted stock unit | 173 |  |  |  | 173 |  |
Expense related to employee stock based compensation | 211 |  |  |  | 211 |  |
Repurchases of common stock (in shares) |  |  |  | 28 |  |  |
Repurchases of common stock | (113) |  |  | $ (113) |  |  |
Cancellation of common stock (in shares) |  |  | (117) | (28) |  |  |
Cancellation of common stock | (98) |  |  | $ 113 | (211) |  |
Exercise of stock options (in shares) |  |  | 345 |  |  |  |
Exercise of stock options | 27 |  |  |  | 27 |  |
Net income | 3,628 |  |  |  |  | 3,628 |
Ending Balance (in shares) at Mar. 31, 2020 |  |  | 12,354 | 0 |  |  |
Ending Balance at Mar. 31, 2020 | 49,397 |  | $ 12 | $ 0 | 85,314 | (35,929) |
Beginning Balance (in shares) at Dec. 31, 2019 |  |  | 12,124 | 27 |  |  |
Beginning Balance at Dec. 31, 2019 | 47,145 |  | $ 12 | $ (111) | 85,249 | (38,005) |
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 |  |
Repurchases of common stock (in shares) |  |  |  | 1 |  |  |
Repurchases of common stock | (2) |  |  | $ (2) |  |  |
Cancellation of common stock (in shares) |  |  | (95) | (28) |  |  |
Cancellation of common stock | (4) |  |  | $ 113 | (117) |  |
Exercise of stock options (in shares) |  |  | 325 |  |  |  |
Exercise of stock options | 0 |  |  |  |  |  |
Net income | 2,076 |  |  |  |  | 2,076 |
Ending Balance (in shares) at Mar. 31, 2020 |  |  | 12,354 | 0 |  |  |
Ending Balance at Mar. 31, 2020 | $ 49,397 |  | $ 12 | $ 0 | 85,314 | (35,929) |
Beginning Balance (in shares) at Sep. 30, 2020 | 12,404 |  | 12,404 | 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 |  |  |  |
Expense related to director restricted stock unit | 232 |  |  |  | 232 |  |
Expense related to employee stock based compensation | $ 612 |  |  |  | 612 |  |
Exercise of stock options (in shares) | 63 |  | 63 |  |  |  |
Exercise of stock options | $ 231 |  | $ 1 |  | 230 |  |
Net income | $ 4,381 |  |  |  |  | 4,381 |
Ending Balance (in shares) at Mar. 31, 2021 | 12,545 |  | 12,545 | 0 |  |  |
Ending Balance at Mar. 31, 2021 | $ 58,893 |  | $ 13 | $ 0 | 86,942 | (28,062) |
Beginning Balance (in shares) at Dec. 31, 2020 |  |  | 12,544 | 0 |  |  |
Beginning Balance at Dec. 31, 2020 | 55,935 |  | $ 13 | $ 0 | 86,551 | (30,629) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Expense related to director restricted stock unit | 116 |  |  |  | 116 |  |
Expense related to employee stock based compensation | 270 |  |  |  | 270 |  |
Exercise of stock options (in shares) |  |  | 1 |  |  |  |
Exercise of stock options | 5 |  |  |  | 5 |  |
Net income | $ 2,567 |  |  |  |  | 2,567 |
Ending Balance (in shares) at Mar. 31, 2021 | 12,545 |  | 12,545 | 0 |  |  |
Ending Balance at Mar. 31, 2021 | $ 58,893 |  | $ 13 | $ 0 | $ 86,942 | $ (28,062) |

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