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Note 5 - Computation of Net Loss Per Common Share (Tables) | 9 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended December 31, |  |  | Nine Months Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (4,324 | ) |  | $ | (7,933 | ) |  | $ | (14,161 | ) |  | $ | (15,062 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares of common stock outstanding |  |  | 28,418 |  |  |  | 26,532 |  |  |  | 28,234 |  |  |  | 24,143 |
Weighted-average shares subject to repurchase |  |  | (1,066 | ) |  |  | (1,062 | ) |  |  | (1,089 | ) |  |  | (1,132 | )
Shares used in per-share calculation ― basic |  |  | 27,352 |  |  |  | 25,470 |  |  |  | 27,145 |  |  |  | 23,011 |
Shares used in per-share calculation ― diluted |  |  | 27,352 |  |  |  | 25,470 |  |  |  | 27,145 |  |  |  | 23,011 |
Net loss per share ― basic |  | $ | (0.16 | ) |  | $ | (0.31 | ) |  | $ | (0.52 | ) |  | $ | (0.65 | )
Net loss per share ― diluted |  | $ | (0.16 | ) |  | $ | (0.31 | ) |  | $ | (0.52 | ) |  | $ | (0.65 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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