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Note 4 - Computation of Net Loss per Common Share (Tables) | 3 Months Ended
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Jun. 30, 2019
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended June 30, |
|  | 2019 |  |  | 2018 |
Numerator: |  |  |  |  |  |  |  |
Net loss |  | $ | (3,539 | ) |  | $ | (4,737 | )
Denominator: |  |  |  |  |  |  |  |
Weighted-average shares of common stock outstanding |  |  | 21,499 |  |  |  | 20,999 |
Weighted-average shares subject to repurchase |  |  | (985 | ) |  |  | (832 | )
Shares used in per-share calculation — basic |  |  | 20,514 |  |  |  | 20,167 |
Shares used in per-share calculation — diluted |  |  | 20,514 |  |  |  | 20,167 |
Net loss per share — basic |  | $ | (0.17 | ) |  | $ | (0.23 | )
Net loss per share — diluted |  | $ | (0.17 | ) |  | $ | (0.23 | )

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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