Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net loss	$ (4,182)	$ (21,278)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock based compensation expense	1,222	1,543
Non-cash interest expense related to debt financing		187
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(980)	(1,332)
Accounts payable	(2,128)	3,175
Accrued expenses	(770)	(701)
Deferred revenue	(221)	(1,036)
Net cash used in operating activities	(7,059)	(19,442)
Financing activities:
Net proceeds from issuance of common stock		18,374
Net cash provided by financing activities		18,374
Net decrease in cash and cash equivalents	(7,059)	(1,068)
Cash and cash equivalents, beginning of period	10,155	70,016
Cash and cash equivalents, end of period	3,096	68,948
Supplemental cash flow disclosure:
Cash paid for interest		$ 550