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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net loss	$ (4,185)	$ (6,200)	$ (12,919)	$ (14,871)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of deferred issuance costs	8	355	8	402
Unrealized loss/(gain) on securities	(39)		(137)
Stock-based compensation - consultants		21	9	63
Stock-based compensation - employees	917	1,238	2,830	2,151
Changes in operating assets and liabilities:
Prepaid expenses	(823)	(734)	(435)	(674)
Other assets	(2)			4
Accounts payable	477	(71)	(417)	1,072
Accrued liabilities	689	(55)	84	(458)
Net cash used in operating activities	(2,958)	(5,446)	(10,977)	(12,311)
Financing activities:
Issuance of shares, options exercise			24
Issuance of shares, net of issuance costs				31,967
Long-term debt			5,000
Debt discount			(14)
Capitalized deferred issuance costs		(117)	(42)	(140)
Net cash provided by financing activities		(117)	4,968	31,827
Increase/(decrease) in cash and cash equivalents	(2,958)	(5,563)	(6,009)	19,516
Cash and cash equivalents - Beginning of period	27,293	38,729	30,344	13,650
Cash and cash equivalents - End of period	$ 24,335	$ 33,166	$ 24,335	33,166
Non-cash investing and financing activities:
Deferred issuance cost (warrant value)				$ 255

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