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Net Loss Per Share | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
Net Loss Per Share | Net Loss Per Share The table below provides a reconciliation of the numerators and denominators of basic and diluted net loss per share for the three and six months ended June 30, 2022 and 2021 (in thousands, except per share amounts):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021 |  |
Numerators: |  |  |  |  |  |  |  |  |
Net loss | $ | (5,144) |  |  | $ | (15,271) |  |  | $ | (14,568) |  |  | $ | (31,081) |  |  |
Less: Income attributable to unvested restricted stock awards | — |  |  | — |  |  | — |  |  | — |  |  |
Numerator for basic net loss per share | (5,144) |  |  | (15,271) |  |  | (14,568) |  |  | (31,081) |  |  |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |
Unvested restricted stock awards | — |  |  | — |  |  | — |  |  | — |  |  |
Numerator for diluted net loss per share | $ | (5,144) |  |  | $ | (15,271) |  |  | $ | (14,568) |  |  | $ | (31,081) |  |  |
Denominators: |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding | 61,948 |  |  | 61,335 |  |  | 61,788 |  |  | 61,252 |  |  |
Less: Weighted average number of unvested restricted stock awards outstanding | (1,244) |  |  | (1,018) |  |  | (1,187) |  |  | (1,045) |  |  |
Denominator for basic and diluted net loss per share | 60,704 |  |  | 60,317 |  |  | 60,601 |  |  | 60,207 |  |  |
Net loss per share: |  |  |  |  |  |  |  |  |
Basic | $ | (0.08) |  |  | $ | (0.25) |  |  | $ | (0.24) |  |  | $ | (0.52) |  |  |
Diluted | (0.08) |  |  | (0.25) |  |  | (0.24) |  |  | (0.52) |  |  |
The calculation of diluted net loss per share for the three and six months ended June 30, 2022 excluded 264 thousand shares and 306 thousand shares, respectively, issuable pursuant to outstanding stock options, due to their antidilutive effect. The calculation of diluted net loss per share for the three and six months ended June 30, 2021 excluded 437 thousand shares and 468 thousand shares, respectively, issuable pursuant to outstanding stock options, due to their antidilutive effect. Additionally, shares issuable upon conversion of both the 2023 Notes and the 2026 Notes were excluded due to, among other factors, their antidilutive effect.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI https://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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