CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
OPERATING CASH FLOW ACTIVITIES:
Net loss	$ (156,797)	$ (110,949)
Reconciliation of net loss to net cash used in operating activities
Depreciation	240	246
Accretion of debt discount and amortization of financing costs	1,066	538
Change in fair value of derivative liabilities	(316)	(63)
Stock-based compensation expense	15,015	12,790
Payable-in-kind interest on Credit Agreement	1,215	403
Loss on disposal of equipment	2
Operating lease right-of-use assets	214	202
Changes in operating assets and liabilities
Accounts receivable	(487)
Inventory	(33)	(1,408)
Prepaid expenses, other current assets and other assets	1,724	(4,934)
Accounts payable, accrued expenses, due to related parties, and other current liabilities	9,098	3,795
Accrued interest	1,153	2,896
Operating lease liabilities	(237)	(218)
Net cash used in operating activities	(128,143)	(96,702)
INVESTING CASH FLOW ACTIVITIES:
Purchases of equipment and leasehold improvements	(20)	(139)
Net cash used in investing activities	(20)	(139)
FINANCING CASH FLOW ACTIVITIES:
Proceeds from long-term debt		98,600
Debt issuance costs		(2,646)
Proceeds from issuance of common stock	24,657
Offering costs for common stock issuance	(739)
Payment of employee tax obligations related to vesting restricted stock units	(27)
Exercise of stock options	508	233
Net cash provided by financing activities	24,399	96,187
Net decrease in cash and cash equivalents	(103,764)	(654)
Cash and cash equivalents, beginning of the period	193,725	232,968
Cash and cash equivalents, end of the period	$ 89,961	232,314
Supplemental cash flow information:
Issuance of stock purchase warrants		$ 3,245