CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash	$ 4,640	$ 1,242
Restricted cash	50	50
Prepaid expenses and other current assets	97	295
Total current assets	4,787	1,587
Property, plant and equipment, net	91	110
Right-of-use assets, net	115	169
Other assets	173
Total assets	5,166	1,866
Current liabilities:
Accounts payable	1,499	676
Accrued and other current liabilities	531	800
Accrual for contingency matter		3,250
Operating lease liability, current	93	110
Total current liabilities	2,123	4,836
Operating lease liability, net of current portion	22	59
Total liabilities	2,145	4,895
Commitments and contingencies (Note 8)
Series E convertible preferred stock, $0.01 par value per share, 5,000 shares authorized, 4,000 shares issued and outstanding	4,018
Stockholders' deficit:
Common stock, par value $0.01 per share, 60,000,000 shares authorized; 11,615,642 and 10,760,871 issued and outstanding at June 30, 2022 and December 31, 2021, respectively	116	108
Additional paid-in capital	79,347	73,801
Accumulated deficit	(80,460)	(76,938)
Total stockholders' deficit	(997)	(3,029)
Total liabilities, convertible preferred stock, and stockholders' deficit	$ 5,166	$ 1,866