Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 35,893	$ 10,640
Restricted cash	891	1,595
Accounts receivable, net	3,259	6,548
Inventories, net	348	97
Prepaid expenses and other current assets	1,074	2,193
Total current assets	41,465	21,073
Property and equipment, net	4,609	5,220
Goodwill	2,116	2,116
Other intangible assets, net	448	553
Restricted cash	270	371
Right-of-use operating lease assets	242	394
Other assets	824	361
Total assets	49,974	30,088
Current liabilities:
Accounts payable	1,561	2,353
Accrued liabilities:
Operating lease liabilities - current	113	149
Employee compensation	688	930
Other accrued liabilities	861	2,099
Total current liabilities	3,223	5,531
Operating lease liabilities - non-current	122	237
Long-term borrowings	0	1,556
Deferred income taxes	139	134
Other liabilities	290	309
Total liabilities	3,774	7,767
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock, $.01 par value, 40,000,000 shares authorized, 31,227,300 and 25,639,702 shares issued, and 30,263,791 and 25,228,951 shares outstanding in 2021 and 2020, respectively	312	262
Additional paid-in capital	164,199	140,138
Accumulated deficit	(114,549)	(114,603)
Accumulated other comprehensive loss	(1,604)	(1,370)
Nil coupon perpetual loan notes	76	76
Treasury stock, at cost (Note 5)	(2,234)	(2,182)
Total stockholders’ equity	46,200	22,321
Total liabilities and stockholders’ equity	$ 49,974	$ 30,088