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Note 10 - Net Loss Per Share | 6 Months Ended
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Jun. 30, 2022
Notes to Financial Statements |
Earnings Per Share [Text Block] | Note 10 — Net Loss Per Share The following table (in thousands, except for loss per share) reconciles basic and diluted weighted average common shares outstanding for each of the six months ended June 30, 2022 and 2021:
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Weighted average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 126,314 |  |  |  | 118,382 |  |  |  | 123,835 |  |  |  | 118,322 |
Dilutive unvested stock, convertible preferred stock, Common Stock Warrants and IPO Warrants |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Diluted |  |  | 126,314 |  |  |  | 118,382 |  |  |  | 123,835 |  |  |  | 118,322 |
Basic and diluted net loss per share attributable to common stockholders |  | $ | (0.13 | ) |  | $ | (0.13 | ) |  | $ | (0.27 | ) |  | $ | (0.19 | )
Potentially dilutive securities not included in the diluted net loss per share computations because their effect would have been anti-dilutive were as follows (in thousands):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Unvested stock and stock units (1) |  |  | 1,981 |  |  |  | 1,555 |  |  |  | 1,666 |  |  |  | 1,034 |
Convertible preferred stock |  |  | 41,725 |  |  |  | 27,129 |  |  |  | 40,159 |  |  |  | 16,143 |
Common Stock Warrants |  |  | 1,474 |  |  |  | 2,873 |  |  |  | 1,463 |  |  |  | 1,967 |
IPO Warrants(2) |  |  | 12,082 |  |  |  | 12,082 |  |  |  | 12,082 |  |  |  | 12,082 |
Total potentially dilutive common shares |  |  | 57,262 |  |  |  | 43,639 |  |  |  | 55,370 |  |  |  | 31,226 |
(1) | Does not include 6.2 million shares for each of the three and six months ended June 30, 2022 and 2.6 million shares for each of the three and six months ended June 30, 2021, of unvested stock and stock units because the performance conditions had not yet been satisfied as of June 30, 2022 and 2021, respectively.
(2) | The IPO Warrants were issued in connection with our initial public offering in 2015 and expired on July 24, 2022.

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