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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Accumulated Deficit
--- | --- | --- | --- | ---
Beginning Balance (in shares) at Sep. 30, 2020 |  | 12,404 |  |
Beginning Balance at Sep. 30, 2020 | $ 53,437 | $ 12 | $ 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 | 116 |  | 116 |
Expense related to employee stock-based compensation | 342 |  | 342 |
Exercise of stock options (in shares) |  | 62 |  |
Exercise of stock options | 226 | $ 1 | 225 |
Net income | 1,814 |  |  | 1,814
Ending Balance (in shares) at Dec. 31, 2020 |  | 12,544 |  |
Ending Balance at Dec. 31, 2020 | $ 55,935 | $ 13 | 86,551 | (30,629)
Beginning Balance (in shares) at Sep. 30, 2021 | 12,714 | 12,714 |  |
Beginning Balance at Sep. 30, 2021 | $ 65,608 | $ 13 | 87,893 | (22,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Expense related to director restricted stock unit | 162 |  | 162 |
Expense related to employee stock-based compensation | 338 |  | 338 |
Exercise of stock warrants (in shares) |  | 54 |  |
Exercise of stock warrants | 200 |  | 200 |
Net income | $ 7,804 |  |  | 7,804
Ending Balance (in shares) at Dec. 31, 2021 | 12,768 | 12,768 |  |
Ending Balance at Dec. 31, 2021 | $ 74,112 | $ 13 | $ 88,593 | $ (14,494)

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