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Basic and Diluted Loss per Common Share | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Basic and Diluted Loss per Common Share | 17. Basic and Diluted Loss per Common Share Basic net loss per share is computed by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. The Company is in a net loss position for the three and nine months ended September 30, 2020 and 2021 and therefore diluted shares equals basic shares. The components of basic and diluted loss per share are as follows:
| Three months ended September 30, |  |  | Nine months ended September 30,
| 2020 |  | 2021 |  |  | 2020 |  | 2021
Earnings per share |  |  |  |  |  |  |  |
Net loss attributable to common stockholders | $ | (2,352) |  |  | $ | (6,944) |  |  |  | $ | (24,051) |  |  | $ | (19,188) |
Net loss per share, basic and diluted | $ | (0.10) |  |  | $ | (0.28) |  |  |  | $ | (1.01) |  |  | $ | (0.77) |
Weighted average number of common shares outstanding, basic and diluted | 24,175,762 |  |  | 25,114,762 |  |  |  | 23,905,322 |  |  | 25,075,941 |
The following common share equivalents were excluded from the weighted average shares used to calculate net loss per common share because their effects would have been anti-dilutive:
| As of September 30,
| 2020 |  | 2021
Stock options issued and outstanding | 269,108 |  |  | 183,271 |
Restricted stock units issued and outstanding | 447,449 |  |  | 369,614 |
Convertible senior notes (1) | 708,073 |  |  | 1,316,199 |
Total | 1,424,630 |  |  | 1,869,084 |
________________________ (1) As of September 30, 2020 and September 30, 2021, the Company used the treasury stock method to calculate the dilutive impact of the 2026 and 2028 Convertible Notes because at that time the Company expected to settle the principal amount of these notes in cash and any excess in shares of the Company's Class A common stock. As of September 30, 2020 and September 30, 2021, the conversion spread, calculated using the average market price of Class A common stock during the period consistent with the treasury stock method, had a dilutive impact for the 2026 Convertible Notes on diluted net income per share of Class A common stock when the average market price of the Company's Class A common stock for a given period exceeded the conversion price of $91.03 per share. As of September 30, 2021, the conversion spread for the 2028 Convertible Notes was anti-dilutive as the average market price of the Company's Class A common stock for a given period did not exceed the conversion price of $179.27 per share.

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