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Equity | 9 Months Ended
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Sep. 30, 2019
Equity [Abstract] |
Equity | Equity The tables below present changes in stockholders' equity for the three and nine months ended September 30, 2019 and 2018.
| Common Stock |  | Additional Paid-in Capital |  | Accumulated Deficit |  | Other Comprehensive Income |  | Total Stockholders' Equity
| Shares |  | Amount |
Balances at June 30, 2019 | 81,046,524 |  |  | $ | 8,105 |  |  | $ | 220,770,338 |  |  | $ | (117,323,976 | ) |  | $ | — |  |  | $ | 103,454,467 |
Net loss | — |  |  | — |  |  | — |  |  | (1,205,827 | ) |  | — |  |  | (1,205,827 | )
Issuance of common stock | 53,332 |  |  | 5 |  |  | (5 | ) |  | — |  |  | — |  |  | — |
Payment of common stock tendered for employee stock-based compensation tax obligations | (25,576 | ) |  | (3 | ) |  | (143,217 | ) |  | — |  |  | — |  |  | (143,220 | )
Stock-based compensation | — |  |  | — |  |  | 761,096 |  |  | — |  |  | — |  |  | 761,096 |
Balances at September 30, 2019 | 81,074,280 |  |  | $ | 8,107 |  |  | $ | 221,388,212 |  |  | $ | (118,529,803 | ) |  | $ | — |  |  | $ | 102,866,516 |
| Common Stock |  | Additional Paid-in Capital |  | Accumulated Deficit |  | Other Comprehensive Income |  | Total Stockholders' Equity
| Shares |  | Amount |
Balances at December 31, 2018 | 80,763,350 |  |  | $ | 8,076 |  |  | $ | 218,697,872 |  |  | $ | (115,791,261 | ) |  | $ | — |  |  | $ | 102,914,687 |
Net loss | — |  |  | — |  |  | — |  |  | (2,738,542 | ) |  | — |  |  | (2,738,542 | )
Issuance of common stock upon exercise of stock options | 9,769 |  |  | 1 |  |  | (1 | ) |  | — |  |  | — |  |  | — |
Issuance of common stock upon vesting of RSUs and exercise of stock-settled appreciation rights | 121,771 |  |  | 12 |  |  | (12 | ) |  | — |  |  | — |  |  | — |
Issuance of common stock upon exercise of warrants | 159,782 |  |  | 16 |  |  | 1,172,785 |  |  | — |  |  | — |  |  | 1,172,801 |
Issuance of common stock | 53,332 |  |  | 5 |  |  | (5 | ) |  | — |  |  | — |  |  | — |
Payment of common stock tendered for employee stock-based compensation tax obligations | (33,724 | ) |  | (3 | ) |  | (199,807 | ) |  | — |  |  | — |  |  | (199,810 | )
Stock-based compensation | — |  |  | — |  |  | 1,717,380 |  |  | — |  |  | — |  |  | 1,717,380 |
Balances at September 30, 2019 | 81,074,280 |  |  | $ | 8,107 |  |  | $ | 221,388,212 |  |  | $ | (118,529,803 | ) |  | $ | — |  |  | $ | 102,866,516 |
| Common Stock |  | Additional Paid-in Capital |  | Accumulated Deficit |  | Other Comprehensive Income |  | Total Stockholders' Deficiency
| Shares |  | Amount |
Balances at June 30, 2018 | 79,160,058 |  |  | $ | 7,916 |  |  | $ | 214,906,962 |  |  | $ | (556,232,608 | ) |  | $ | — |  |  | $ | (341,317,730 | )
Net loss | — |  |  | — |  |  | — |  |  | 388,050,413 |  |  | — |  |  | 388,050,413 |
Issuance of common stock upon exercise of stock options | 395,663 |  |  | 39 |  |  | 252,640 |  |  | — |  |  | — |  |  | 252,679 |
Issuance of common stock upon vesting of RSUs and exercise of stock-settled appreciation rights | 227,287 |  |  | 23 |  |  | (23 | ) |  | — |  |  | — |  |  | — |
Issuance of common stock upon exercise of warrants | 760,625 |  |  | 76 |  |  | 6,007,771 |  |  | — |  |  | — |  |  | 6,007,847 |
Payment of common stock tendered for employee stock-based compensation tax obligations | (223,098 | ) |  | (22 | ) |  | (1,695,940 | ) |  | — |  |  | — |  |  | (1,695,962 | )
Stock-based compensation | — |  |  | — |  |  | 1,176,558 |  |  | — |  |  | — |  |  | 1,176,558 |
Balances at September 30, 2018 | 80,320,535 |  |  | $ | 8,032 |  |  | $ | 220,647,968 |  |  | $ | (168,182,195 | ) |  | $ | — |  |  | $ | 52,473,805 |
| Common Stock |  | Additional Paid-in Capital |  | Accumulated Deficit |  | Other Comprehensive Income |  | Total Stockholders' Deficiency
| Shares |  | Amount |
Balances at December 31, 2017 | 79,039,000 |  |  | $ | 7,904 |  |  | $ | 214,229,581 |  |  | $ | (537,375,776 | ) |  | $ | — |  |  | $ | (323,138,291 | )
Net income | — |  |  | — |  |  | — |  |  | 369,416,894 |  |  | — |  |  | 369,416,894 |
Issuance of common stock upon exercise of stock options | 408,698 |  |  | 41 |  |  | 252,638 |  |  | — |  |  | — |  |  | 252,679 |
Issuance of common stock upon vesting of RSUs and exercise of stock-settled appreciation rights | 337,084 |  |  | 33 |  |  | (33 | ) |  | — |  |  | — |  |  | — |
Issuance of common stock upon exercise of warrants | 760,625 |  |  | 76 |  |  | 6,007,771 |  |  | — |  |  | — |  |  | 6,007,847 |
Payment of common stock tendered for employee stock-based compensation tax obligations | (224,872 | ) |  | (22 | ) |  | (1,708,268 | ) |  | — |  |  | — |  |  | (1,708,290 | )
Cumulative effect of accounting change | — |  |  | — |  |  | — |  |  | (223,313 | ) |  | — |  |  | (223,313 | )
Stock-based compensation | — |  |  | — |  |  | 1,866,279 |  |  | — |  |  | — |  |  | 1,866,279 |
Balances at September 30, 2018 | 80,320,535 |  |  | $ | 8,032 |  |  | $ | 220,647,968 |  |  | $ | (168,182,195 | ) |  | $ | — |  |  | $ | 52,473,805 |

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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