CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash	$ 11,446	$ 16,985
Other receivable	951	684
Prepaid expenses and other current assets	1,284	1,097
Total current assets	13,681	18,766
Restricted cash	4,095	0
Property and equipment, net	236	670
Right-of-use assets - operating leases	1,030	2,567
Goodwill	2,044	2,044
In-process research and development	0	5,990
Investment in non-controlling interest	59	1,000
Other assets	1,134	488
Total assets	22,279	31,525
Current liabilities:
Accounts payable	1,620	1,755
Accrued expenses	3,626	1,249
Due to related party, current	1,750	0
Operating lease liabilities, current	295	426
Other current liabilities	363	247
Total current liabilities	7,654	3,677
Due to related party, non-current	1,206	0
Warrant liabilities	331	0
Operating lease liabilities, non-current	887	2,297
Other liabilities	94	48
Total liabilities	10,172	6,022
Commitments and contingencies (Note 12)
Stockholders' equity:
Common stock, $0.005 par value, 100,000 shares authorized at December 31, 2022 and 2021; 5,127 and 2,601 issued and outstanding at December 31, 2022 and 2021, respectively	26	13
Additional paid-in capital	177,377	166,191
Accumulated deficit	(165,297)	(140,702)
Total stockholders' equity	12,107	25,503
Total liabilities and stockholders' equity	22,279	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 December 31, 2022 and 2021, $156 liquidation preference	$ 1	$ 1

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).