Liquidity and Capital Resources	9 Months Ended
Sep. 30, 2021
Liquidity And Capital Resources [Abstract]
Liquidity and Capital Resources	2. LIQUIDITY AND CAPITAL RESOURCES The unaudited condensed consolidated financial statements have been prepared as though the Company will continue as a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Company has an accumulated deficit of $476,312 and $488,195, as of September 30, 2021 and December 31, 2020, respectively. As of September 30, 2021, the Company had cash and cash equivalents of $189,704. On August 21, 2020, the Company received aggregate proceeds from a common stock offering of approximately $135,435, net of underwriting discounts and commissions and other estimated offering expenses (see Note 11). On January 9, 2020, the Company received aggregate proceeds of approximately $200,000 through the loan agreement with OrbiMed Royalty & Credit Opportunities, LP (“OrbiMed”). This capital raise and debt issuance has resolved the Company’s significant risks and uncertainties regarding sources of liquidity, which previously raised substantial doubt about the Company’s ability to continue as a going concern. On August 9, 2021, the Company sold 1,048,951 shares of the Company’s common stock to Blackstone Alternative Credit Advisors (“Blackstone”) at a price per share of $28.60 for gross proceeds of $30,000. In addition, the Company received aggregate proceeds of approximately $200,000 through the credit agreement (“Blackstone Credit Agreement”) with Blackstone and repaid in full the loan with OrbiMed (see note 8). The Company believes that its anticipated cash from operating and financing activities and existing cash and cash equivalents will enable the Company to meet its operational liquidity needs and fund its planned investing activities for the next twelve months from the date of issuance of these unaudited condensed consolidated financial statements.

Liquidity and Capital Resources

9 Months Ended

Sep. 30, 2021

Liquidity And Capital Resources [Abstract]

2. LIQUIDITY AND CAPITAL RESOURCES

The unaudited condensed consolidated financial statements have been prepared as though the Company will continue as a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Company has an accumulated deficit of $476,312 and $488,195, as of September 30, 2021 and December 31, 2020, respectively. As of September 30, 2021, the Company had cash and cash equivalents of $189,704.

On August 21, 2020, the Company received aggregate proceeds from a common stock offering of approximately $135,435, net of underwriting discounts and commissions and other estimated offering expenses

(see Note 11). On January 9, 2020, the Company received aggregate proceeds of approximately $200,000 through the loan agreement with OrbiMed Royalty & Credit Opportunities, LP (“OrbiMed”). This capital raise and debt issuance has resolved the Company’s significant risks and uncertainties regarding sources of liquidity, which previously raised substantial doubt about the Company’s ability to continue as a going concern.

On August 9, 2021, the Company sold 1,048,951 shares of the Company’s common stock to Blackstone Alternative Credit Advisors (“Blackstone”) at a price per share of $28.60 for gross proceeds of $30,000. In addition, the Company received aggregate proceeds of approximately $200,000 through the credit agreement (“Blackstone Credit Agreement”) with Blackstone and repaid in full the loan with OrbiMed (see note 8).

The Company believes that its anticipated cash from operating and financing activities and existing cash and cash equivalents will enable the Company to meet its operational liquidity needs and fund its planned investing activities for the next twelve months from the date of issuance of these unaudited condensed consolidated financial statements.