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Net Loss per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Net Loss per Share |
Schedule of outstanding potentially dilutive common stock | ​
​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
​ |  | 2021 |  | 2020
Convertible preferred stock (as converted) |  | 15,906,537 |  | 12,528,612
Options issued and outstanding |  | 4,318,992 |  | 4,587,865
Warrants for common stock |  | 149,800 |  | 201,131
Total |  | 20,375,329 |  | 17,317,608
Schedule of basic and diluted net loss per share attributable to common stockholders | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30, | ​
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020 | ​
Net loss | ​ | $ | (3,110) | ​ | $ | (1,791) | ​ | $ | (4,377) | ​ | $ | (5,971) | ​
Cumulative preferred stock dividends | ​ |  | (1,859) | ​ |  | (1,064) | ​ |  | (4,326) | ​ |  | (3,170) | ​
Net loss attributable to common stockholders | ​ | $ | (4,969) | ​ | $ | (2,855) | ​ | $ | (8,703) | ​ | $ | (9,141) | ​
Weighted-average common shares outstanding - basic and diluted | ​ |  | 611,680 | ​ |  | 537,315 | ​ |  | 585,320 | ​ |  | 498,415 | ​
Total | ​ | $ | (8.12) | ​ | $ | (5.31) | ​ | $ | (14.87) | ​ | $ | (18.34) | ​

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + 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 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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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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