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Equity (Tables) | 3 Months Ended
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Mar. 31, 2023
Equity |
Summary of changes in Shareholders' Equity | The changes in shareholders’ equity for the three months ended March 31, 2023 were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ |  | Additional | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ |  | Total
​ | Common Stock |  | Paid- In | ​ | Treasury Stock | ​ | Accumulated |  | Shareholders’
​ | Shares |  | ​ | Amount |  | Capital | ​ | Shares | ​ | ​ | Amount |  | Deficit |  | Equity
Balance, December 31, 2022 | 37,084,759 | ​ | $ | 37 | ​ | $ | 538,073 | ​ | (3,235,823) | ​ | $ | (61,924) | ​ | $ | (281,344) | ​ | $ | 194,842
Exercise of common stock options | 234,132 | ​ | ​ | — | ​ | ​ | 3,848 | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3,848
Issuance for employee stock purchase plan | 11,329 | ​ | ​ | — | ​ | ​ | 169 | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 169
Vesting of RSUs and PSUs | 775,904 | ​ | ​ | 1 | ​ | ​ | — | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1
Shares withheld for employee taxes upon vesting of RSUs and PSUs | (289,281) | ​ | ​ | — | ​ | ​ | (7,736) | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (7,736)
Stock-based compensation | — | ​ | ​ | — | ​ | ​ | 6,035 | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,035
Net loss | — | ​ | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | — | ​ | ​ | (17,426) | ​ | ​ | (17,426)
Balance, March 31, 2023 | 37,816,843 | ​ | $ | 38 | ​ | $ | 540,389 | ​ | (3,235,823) | ​ | $ | (61,924) | ​ | $ | (298,770) | ​ | $ | 179,733
​ The changes in shareholders’ equity for the three months ended March 31, 2022 were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ |  | Additional | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ |  | Total
​ | Common Stock |  | Paid- In | ​ | Treasury Stock | ​ | Accumulated |  | Shareholders’
​ | Shares |  | ​ | Amount |  | Capital | ​ | Shares | ​ | ​ | Amount |  | Deficit |  | Equity
Balance, December 31, 2021 | 35,806,119 | ​ | $ | 36 | ​ | $ | 502,095 | ​ | (2,150,717) | ​ | $ | (42,861) | ​ | $ | (256,342) | ​ | $ | 202,928
Exercise of common stock options | 190,074 | ​ | ​ | — | ​ | ​ | 3,261 | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3,261
Issuance for employee stock purchase plan | 13,421 | ​ | ​ | — | ​ | ​ | 203 | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 203
Vesting of RSUs and PSUs | 563,050 | ​ | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Shares withheld for employee taxes upon vesting of RSUs and PSUs | (191,667) | ​ | ​ | — | ​ | ​ | (3,382) | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (3,382)
Share repurchases | — | ​ | ​ | — | ​ | ​ | 5,000 | ​ | (307,132) | ​ | ​ | (5,000) | ​ | ​ | — | ​ | ​ | —
Stock-based compensation | — | ​ | ​ | — | ​ | ​ | 6,135 | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,135
Net loss | — | ​ | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | — | ​ | ​ | (13,069) | ​ | ​ | (13,069)
Balance, March 31, 2022 | 36,380,997 | ​ | $ | 36 | ​ | $ | 513,312 | ​ | (2,457,849) | ​ | $ | (47,861) | ​ | $ | (269,411) | ​ | $ | 196,076
​

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 + Details
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