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Note 5 - Computation of Net Loss Per Common Share - Reconciliation of Numerators and Denominators of EPS Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 7 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Oct. 26, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Net loss | $ (7,933) | $ (3,712) | $ (3,417) | $ (6,845) | $ (825) | $ (3,539) | $ (11,209) | $ (15,062) | $ (11,209)
Less: decrease in fair value of warrants, net of income tax |  |  |  | (556) |  |  | $ 4,648 |  | (4,648)
Plus: change in fair value due to exercise of warrants |  |  |  |  |  |  |  |  | 83
Net loss - diluted | $ (7,933) |  |  | $ (7,401) |  |  |  | $ (15,062) | $ (15,774)
Weighted-average shares of common stock outstanding (in shares) | 26,532 |  |  | 22,110 |  |  |  | 24,143 | 21,729
Weighted-average shares subject to repurchase (in shares) | (1,062) |  |  | (925) |  |  |  | (1,132) | (943)
Shares used in per-share calculation - basic (in shares) | 25,470 |  |  | 21,185 |  |  |  | 23,011 | 20,786
Common stock warrants (in shares) |  |  |  | 18 |  |  |  |  | 108
Shares used in per-share calculation - diluted (in shares) | 25,470 |  |  | 21,203 |  |  |  | 23,011 | 20,894
Net loss per share - basic (in dollars per share) | $ (0.31) |  |  | $ (0.32) |  |  |  | $ (0.65) | $ (0.54)
Net loss per share - diluted (in dollars per share) | $ (0.31) |  |  | $ (0.35) |  |  |  | $ (0.65) | $ (0.75)

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