Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 35,161	$ 10,640
Restricted cash	891	1,595
Accounts receivable, net	5,062	6,548
Inventories, net	128	97
Prepaid expenses and other current assets	1,064	2,193
Total current assets	42,306	21,073
Property and equipment, net of accumulated depreciation of $18,582 and $26,889, respectively	5,293	5,220
Goodwill	2,116	2,116
Other intangible assets, net of accumulated amortization of $871 and $757, respectively	475	553
Restricted cash	270	371
Right-of-use operating lease assets	283	394
Other assets	296	361
Total assets	51,039	30,088
Current liabilities:
Accounts payable	1,354	2,353
Accrued liabilities:
Operating lease liabilities - current	128	149
Employee compensation	701	930
Other accrued liabilities	1,829	2,099
Total current liabilities	4,012	5,531
Operating lease liabilities - non-current	147	237
Long-term borrowings	0	1,556
Deferred income taxes, net	134	134
Other liabilities	302	309
Total liabilities	4,595	7,767
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, respectively	312	262
Additional paid-in capital	164,178	140,138
Accumulated deficit	(114,305)	(114,603)
Accumulated other comprehensive loss	(1,583)	(1,370)
Nil coupon perpetual loan notes	76	76
Treasury stock, at cost	(2,234)	(2,182)
Total stockholders’ equity	46,444	22,321
Total liabilities and stockholders’ equity	$ 51,039	$ 30,088