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Nature of Operations and Basis of Presentation - Comparison of Reported Results of Operations and Cash Flows as a Result of Reclassifications (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2022
Depreciation and amortization | $ 362 | $ 338 |  |
Loss from disposal of long-lived assets, net | 2 | 18 |  |
Net loss | $ 13,196 | $ 12,010 |  |
Net loss per common share diluted (in dollars per share) | $ (0.71) | $ (0.68) |  |
Net loss per common share basic (in dollars per share) | $ (0.71) | $ (0.68) |  |
Consolidated Balance Sheets |  |  |  |
Additional paid-in capital | $ 504,298 |  |  | $ 500,125
Accumulated deficit | (329,750) |  |  | $ (313,829)
Consolidated Statement of Stockholders’ Equity |  |  |  |
Stock option exercises | 872 | $ 6,371 | [1] |
Retirement of common stock | $ 2,725 | 1,000 | [1] |
Impact of Prior Period Errors |  |  |  |
Depreciation and amortization |  | 60 |  |
Loss from disposal of long-lived assets, net |  | 15 |  |
Net loss |  | $ 60 |  |
Net loss per common share diluted (in dollars per share) |  | $ 0.01 |  |
Net loss per common share basic (in dollars per share) |  | $ 0.01 |  |
Consolidated Balance Sheets |  |  |  |
Additional paid-in capital |  | $ 1,000 |  |
Accumulated deficit |  | $ (1,000) |  |
Common ‎stock |  |  |  |
Consolidated Statement of Stockholders’ Equity |  |  |  |
Stock option exercises (in shares) | 37 | 295 | [1] |
Retirement of common stock (in shares) | (56) | (20) | [1] |
Common ‎stock | Impact of Prior Period Errors |  |  |  |
Consolidated Statement of Stockholders’ Equity |  |  |  |
Stock option exercises (in shares) |  | 20 |  |
Retirement of common stock (in shares) |  | (20) |  |
Additional ‎paid-in ‎capital |  |  |  |
Consolidated Statement of Stockholders’ Equity |  |  |  |
Stock option exercises | $ 872 | $ 6,371 | [1] |
Additional ‎paid-in ‎capital | Impact of Prior Period Errors |  |  |  |
Consolidated Statement of Stockholders’ Equity |  |  |  |
Stock option exercises |  | 1,000 |  |
Retirement of common stock |  | 0 |  |
Accumulated ‎deficit |  |  |  |
Net loss | 13,196 | 12,010 |  |
Consolidated Statement of Stockholders’ Equity |  |  |  |
Retirement of common stock | $ 2,725 | 1,000 | [1] |
Accumulated ‎deficit | Impact of Prior Period Errors |  |  |  |
Consolidated Statement of Stockholders’ Equity |  |  |  |
Stock option exercises |  | 0 |  |
Retirement of common stock |  | 1,000 |  |
Impairment of long-lived assets | Impact of Prior Period Errors |  |  |  |
Impairment of long-lived assets |  | $ (15) |  |
[1] | Includes approximately $1.0 million, or 20,132 shares, received associated with a non-cash exercise of stock options and subsequent retirement. See Note 7 Stockholders’ Equity.

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