Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net loss	$ (9,291)	$ (10,706)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	636	474
Non-cash lease expense	8	18
Depreciation	19	36
Loss on sale of property and equipment	75
Change in assets and liabilities:
Prepaid expenses and other assets	(627)	(219)
Accounts payable	114	(1,646)
Accrued and other liabilities	(839)	(192)
Net cash used in operating activities	(9,905)	(12,235)
Investing activities
Purchases of property and equipment		(3)
Sale of property and equipment	8
Net cash provided by (used in) investing activities	8	(3)
Financing activities
Proceeds from equity offering		10,000
Payment of issuance costs	(134)	(932)
Exercise of stock options		72
Net cash (used in) provided by financing activities	(134)	9,140
Net decrease in cash	(10,031)	(3,098)
Net foreign exchange difference		(7)
Cash at beginning of period	16,387	10,089
Cash at end of period	6,356	6,984
Supplemental non-cash investing and financing transactions:
Modification of right-of-use asset and associated lease liability	62
Unpaid deferred issuance costs	$ 205	$ 25