CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash	$ 13,254	$ 16,985
Other receivable	926	684
Prepaid expenses and other current assets	1,672	1,097
Total current assets	15,852	18,766
Property and equipment, net	231	670
Right-of-use assets - operating leases	1,912	2,567
Goodwill	2,044	2,044
In-process research and development	0	5,990
Investment in non-controlling interest	68	1,000
Other assets	819	488
Total assets	20,926	31,525
Current liabilities:
Accounts payable	1,150	1,755
Accrued expenses	3,230	1,249
Operating lease liabilities, current	436	426
Finance lease liabilities, current	3	0
Other current liabilities	2,648	247
Total current liabilities	7,467	3,677
Warrant liabilities	633	0
Operating lease liabilities, non-current	2,317	2,297
Finance lease liabilities, non-current	6	0
Other liabilities	1,690	48
Total liabilities	12,113	6,022
Stockholders' equity:
Common stock, $0.005 par value, 100,000 shares authorized at September 30, 2022 and December 31, 2021; 2,942 and 2,601 issued and outstanding at September 30, 2022 and December 31, 2021, respectively	15	13
Additional paid-in capital	169,596	166,190
Accumulated deficit	(160,799)	(140,701)
Total stockholders' equity	8,813	25,503
Total liabilities and stockholders' equity	20,926	31,525
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, $0.005 par value, 1,000 shares authorized, 156 designated and outstanding of Series A convertible preferred stock at September 30, 2022 and December 31, 2021, $156 liquidation preference	$ 1	$ 1