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Summary of Business and Significant Accounting Policies (Stock-Based Compensation Plans) (Details) $ in Thousands | 12 Months Ended | 252 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 31, 2022 USD ($) | Dec. 31, 2003 USD ($) | Jan. 31, 2021 USD ($) | Jan. 31, 2020 USD ($)
Accounting Policies [Abstract] |  |  |  |
Stock dividend, return percentage (as a percent) |  | 10.00% |  |
Market capitalization reclassified on date of dividend declaration (percent) |  | 10.00% |  |
Stock conversion ratio | 1.5 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stockholders' equity | $ 47,446 |  | $ 54,187 | $ 54,818
Additional Paid-in Capital |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stockholders' equity | 120,492 | $ 122,000 | 119,655 | 118,782
Accumulated Deficit |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stockholders' equity | $ (67,178) |  | $ (52,042) | $ (49,810)

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