CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands | Total | At The Market Offering | Underwritten Public Offering | Common Stock | Common StockAt The Market Offering | Common StockUnderwritten Public Offering | Additional Paid-in Capital | Additional Paid-in CapitalAt The Market Offering | Additional Paid-in CapitalUnderwritten Public Offering | Accumulated Deficit | Other Comprehensive Income |
Beginning Balance at Dec. 31, 2018 | $ 78,744 | | | $ 2 | | | $ 175,201 | | | $ (96,459) | |
Beginning Balance, Shares at Dec. 31, 2018 | | | | 18,569,289 | | | | | | | |
Net loss | (8,719) | | | | | | | | | (8,719) | |
Issuance of common stock upon exercise of stock options | 18 | | | | | | 18 | | | | |
Issuance of common stock upon exercise of stock options, Shares | | | | 11,141 | | | | | | | |
Stock-based compensation | 355 | | | | | | 355 | | | | |
Ending Balance at Mar. 31, 2019 | 70,398 | | | $ 2 | | | 175,574 | | | (105,178) | |
Ending Balance, Shares at Mar. 31, 2019 | | | | 18,580,430 | | | | | | | |
Beginning Balance at Dec. 31, 2018 | 78,744 | | | $ 2 | | | 175,201 | | | (96,459) | |
Beginning Balance, Shares at Dec. 31, 2018 | | | | 18,569,289 | | | | | | | |
Net loss | (22,182) | | | | | | | | | | |
Ending Balance at Sep. 30, 2019 | 57,886 | | | $ 2 | | | 176,524 | | | (118,640) | |
Ending Balance, Shares at Sep. 30, 2019 | | | | 18,629,730 | | | | | | | |
Beginning Balance at Mar. 31, 2019 | 70,398 | | | $ 2 | | | 175,574 | | | (105,178) | |
Beginning Balance, Shares at Mar. 31, 2019 | | | | 18,580,430 | | | | | | | |
Net loss | (7,255) | | | | | | | | | (7,255) | |
Stock-based compensation | 326 | | | | | | 326 | | | | |
Ending Balance at Jun. 30, 2019 | 63,469 | | | $ 2 | | | 175,900 | | | (112,433) | |
Ending Balance, Shares at Jun. 30, 2019 | | | | 18,580,430 | | | | | | | |
Net loss | (6,207) | | | | | | | | | (6,207) | |
Issuance of common stock, net of commissions and issuance costs | | $ 256 | | | | | | $ 256 | | | |
Issuance of common stock net of commissions and issuance costs, Shares | | | | | 40,300 | | | | | | |
Issuance of common stock upon exercise of stock options | 35 | | | | | | 35 | | | | |
Issuance of common stock upon exercise of stock options, Shares | | | | 9,000 | | | | | | | |
Stock-based compensation | 333 | | | | | | 333 | | | | |
Ending Balance at Sep. 30, 2019 | 57,886 | | | $ 2 | | | 176,524 | | | (118,640) | |
Ending Balance, Shares at Sep. 30, 2019 | | | | 18,629,730 | | | | | | | |
Beginning Balance at Dec. 31, 2019 | 51,365 | | | $ 2 | | | 180,818 | | | (129,455) | |
Beginning Balance, Shares at Dec. 31, 2019 | | | | 19,418,955 | | | | | | | |
Net loss | (7,092) | | | | | | | | | (7,092) | |
Issuance of common stock, net of commissions and issuance costs | | $ 10,253 | | | | | | $ 10,253 | | | |
Issuance of common stock net of commissions and issuance costs, Shares | | | | | 1,502,892 | | | | | | |
Issuance of common stock upon exercise of stock options | 154 | | | | | | 154 | | | | |
Issuance of common stock upon exercise of stock options, Shares | | | | 30,143 | | | | | | | |
Vesting of restricted stock | (84) | | | | | | (84) | | | | |
Vesting of restricted stock, Shares | | | | 29,890 | | | | | | | |
Stock-based compensation | 508 | | | | | | 508 | | | | |
Ending Balance at Mar. 31, 2020 | 55,104 | | | $ 2 | | | 191,649 | | | (136,547) | |
Ending Balance, Shares at Mar. 31, 2020 | | | | 20,981,880 | | | | | | | |
Beginning Balance at Dec. 31, 2019 | 51,365 | | | $ 2 | | | 180,818 | | | (129,455) | |
Beginning Balance, Shares at Dec. 31, 2019 | | | | 19,418,955 | | | | | | | |
Net loss | $ (24,425) | | | | | | | | | | |
Issuance of common stock upon exercise of stock options, Shares | 116,171 | | | | | | | | | | |
Unrealized gain on short term investments | $ 8 | | | | | | | | | | |
Ending Balance at Sep. 30, 2020 | 89,815 | | | $ 3 | | | 243,684 | | | (153,880) | $ 8 |
Ending Balance, Shares at Sep. 30, 2020 | | | | 27,320,459 | | | | | | | |
Beginning Balance at Mar. 31, 2020 | 55,104 | | | $ 2 | | | 191,649 | | | (136,547) | |
Beginning Balance, Shares at Mar. 31, 2020 | | | | 20,981,880 | | | | | | | |
Net loss | (8,295) | | | | | | | | | (8,295) | |
Issuance of common stock, net of commissions and issuance costs | | | $ 50,148 | | | $ 1 | | | $ 50,147 | | |
Issuance of common stock net of commissions and issuance costs, Shares | | | | | | 6,220,589 | | | | | |
Issuance of common stock upon exercise of stock options | 561 | | | | | | 561 | | | | |
Issuance of common stock upon exercise of stock options, Shares | | | | 85,528 | | | | | | | |
Vesting of restricted stock | (80) | | | | | | (80) | | | | |
Stock-based compensation | 621 | | | | | | 621 | | | | |
Ending Balance at Jun. 30, 2020 | 98,059 | | | $ 3 | | | 242,898 | | | (144,842) | |
Ending Balance, Shares at Jun. 30, 2020 | | | | 27,287,997 | | | | | | | |
Net loss | (9,038) | | | | | | | | | (9,038) | |
Issuance costs | 40 | | | | | | 40 | | | | |
Issuance of common stock upon exercise of stock options | 2 | | | | | | 2 | | | | |
Issuance of common stock upon exercise of stock options, Shares | | | | 500 | | | | | | | |
Vesting of restricted stock, Shares | | | | 31,962 | | | | | | | |
Stock-based compensation | 744 | | | | | | 744 | | | | |
Unrealized gain on short term investments | 8 | | | | | | | | | | 8 |
Ending Balance at Sep. 30, 2020 | $ 89,815 | | | $ 3 | | | $ 243,684 | | | $ (153,880) | $ 8 |
Ending Balance, Shares at Sep. 30, 2020 | | | | 27,320,459 | | | | | | | |