CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (27,400)	$ (18,660)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	8	14
Amortization of contract asset		68
Change in right-of-use asset	206	191
Stock-based compensation expense	2,470	1,745
Foreign currency loss	498	150
Change in fair value of restricted stock liability		(204)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	336	(134)
Research and development incentive receivable	(638)	(258)
Deferred offering costs		209
Accounts payable and accrued expenses	679	1,488
Deferred revenue		(750)
Lease liability	(208)	(198)
Other assets	272
Net cash used in operating activities	(23,777)	(16,339)
Cash flows from financing activities:
Proceeds from the exercise of common stock warrants		14
Proceeds from the exercise of stock options		4
Payment of deferred costs	(210)
Net cash provided by (used in) financing activities	(210)	18
Effect of exchange rate changes on cash and cash equivalents	(46)	(16)
Net decrease in cash and cash equivalents	(24,033)	(16,337)
Cash and cash equivalents at beginning of period	114,916	52,071
Cash and cash equivalents at end of period	90,883	$ 35,734
Supplemental disclosure of non-cash investing and financing activities:
Remeasurement of right-of-use asset and lease liability	$ 609