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Shareholders' Deficit (Tables) | 6 Months Ended
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Jun. 30, 2021
Shareholders' Deficit |
Schedule of Shareholders' Deficit | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Additional | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Common | ​ | Paid-In | ​ | Accumulated | ​ | ​ | ​
​ |  | Stock |  | Capital |  | Deficit | ​ | Total
​ | ​ | ​ | (In thousands)
Balance January 1, 2021 | ​ | $ | 616 | ​ | $ | 751,304 | ​ | $ | (872,672) | ​ | $ | (120,752)
Exercise of stock options and warrants | ​ | ​ | 6 | ​ | ​ | 6,327 | ​ | ​ | — | ​ | ​ | 6,333
At the market offering costs | ​ | ​ | — | ​ | ​ | (241) | ​ | ​ | — | ​ | ​ | (241)
Cumulative effect of adopting ASU 2020-06 | ​ | ​ | — | ​ | ​ | (70,779) | ​ | ​ | (4,697) | ​ | ​ | (75,476)
Stock-based compensation expense | ​ | ​ | — | ​ | ​ | 3,271 | ​ | ​ | — | ​ | ​ | 3,271
Net loss | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (35,090) | ​ | ​ | (35,090)
Balance March 31, 2021 | ​ | ​ | 622 | ​ | ​ | 689,882 | ​ | ​ | (912,459) | ​ | ​ | (221,955)
Exercise of stock options | ​ | ​ | 2 | ​ | ​ | 1,133 | ​ | ​ | — | ​ | ​ | 1,135
Stock-based compensation expense | ​ | ​ | — | ​ | ​ | 3,117 | ​ | ​ | — | ​ | ​ | 3,117
Net loss | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (28,593) | ​ | ​ | (28,593)
Balance June 30, 2021 | ​ | $ | 624 | ​ | $ | 694,132 | ​ | $ | (941,052) | ​ | $ | (246,296)
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Additional | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Common | ​ | Paid-In | ​ | Accumulated | ​ | ​ | ​
​ |  | Stock |  | Capital |  | Deficit | ​ | Total
​ | ​ | ​ | (In thousands)
Balance January 1, 2020 | ​ | $ | 542 | ​ | $ | 625,048 | ​ | $ | (734,611) | ​ | $ | (109,021)
Exercise of stock options | ​ | ​ | 3 | ​ | ​ | 2,709 | ​ | ​ | — | ​ | ​ | 2,712
Stock-based compensation expense | ​ | ​ | — | ​ | ​ | 3,476 | ​ | ​ | — | ​ | ​ | 3,476
Net loss | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (29,031) | ​ | ​ | (29,031)
Balance March 31, 2020 | ​ | ​ | 545 | ​ | ​ | 631,233 | ​ | ​ | (763,642) | ​ | ​ | (131,864)
Exercise of stock options | ​ | ​ | — | ​ | ​ | 66 | ​ | ​ | — | ​ | ​ | 66
Stock-based compensation expense | ​ | ​ | — | ​ | ​ | 3,822 | ​ | ​ | — | ​ | ​ | 3,822
Net loss | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (33,294) | ​ | ​ | (33,294)
Balance June 30, 2020 | ​ | $ | 545 | ​ | $ | 635,121 | ​ | $ | (796,936) | ​ | $ | (161,270)

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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 http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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