CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net loss	$ (54,596)	$ (40,587)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	16	29
Amortization of contract asset		135
Change in right-of-use asset	399	392
Stock-based compensation expense	5,180	3,686
Foreign currency loss	608	379
Change in fair value of restricted stock liability		(204)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	416	(639)
Deferred tax asset	152	11
Research and development incentive receivable	(1,009)	(1,159)
Deferred costs		209
Accounts payable and accrued expenses	945	3,900
Deferred revenue		(1,500)
Lease liability	(400)	(406)
Other assets	(755)	597
Net cash used in operating activities	(49,044)	(35,157)
Cash flows from financing activities:
Proceeds from the issuance of common stock and prefunded warrants, net of offering costs - September 2021 Public Offering		97,222
Proceeds from the exercise of common stock warrants		993
Proceeds from the exercise of stock options		4
Payment of deferred costs	(210)	(184)
Net cash provided by (used in) financing activities	(210)	98,035
Effect of exchange rate changes on cash and cash equivalents	(162)	(33)
Net increase (decrease) in cash and cash equivalents	(49,416)	62,845
Cash and cash equivalents at beginning of period	114,916	52,071
Cash and cash equivalents at end of period	65,500	114,916
Supplemental disclosure of non-cash financing activities:
Deferred costs in accounts payable and accrued expense - January 2023 Flame Merger	576
Deferred costs in accounts payable and accrued expense - September 2021 Public Offering		210
Remeasurement of right-of-use asset and lease liability	$ 609	$ 323