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Common Stock Warrants (Tables)
 9 Months Ended
Sep. 30, 2024
Equity [Abstract]  
Schedule of Warrants
As of September 30, 2024, the Company’s outstanding warrants and pre-funded warrants to purchase shares of common stock consisted of the following:
Issuance DateNumber of
Shares of
Common
Stock Issuable		Exercise
Price		Expiration Date
October 25, 20165,155 $19.78 October 24, 2026
December 28, 2017115,916 $19.78 December 28, 2027
September 12, 201820,220 $19.78 September 12, 2028
October 19, 201820,016 $19.78 October 19, 2028
March 13, 20195,000 $19.78 March 12, 2029
November 29, 20191,250,000 $12.00 (a)n/a
March 23, 202150,000 $8.70 (b)n/a
November 9, 20212,008,032 $4.98 (c)n/a
March 3, 2022766,666 $1.80 (d)n/a
July 6, 202213,276,279 $1.095 (e)n/a
July 6, 202244,075,050 $1.095 July 6, 2027
December 9, 202232,137,448 $1.50 December 9, 2027
December 9, 20226,800,000 $1.10 (f)n/a
May 18, 20238,263,157 $1.52 (g)n/a
108,792,939 
(a) In November 2019, the Company received $11.999 per pre-funded warrant, or $21.0 million in aggregate proceeds. Each pre-funded
warrant may be exercised for an additional $0.001 per pre-funded warrant. (b) In March 2021, the Company received $8.69 per pre-funded warrant, or $435 thousand in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.01 per pre-funded warrant. (c) In November 2021, the Company received $4.97 per pre-funded warrant, or $10.0 million in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.01 per pre-funded warrant. (d) In March 2022, the Company received $1.79 per
pre-funded warrant, or $1.4 million in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.01 per pre-funded warrant. (e) In July 2022, the Company received $1.094 per pre-funded warrant, or $14.5 million in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.001 per pre-funded warrant. (f) In December 2022, the Company received $1.099 per pre-funded warrant, or $7.5 million in aggregate proceeds. (g) In May 2023, the Company received $1.519 per pre-funded warrant, or $12.6 million in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.001 per pre-funded warrant.