Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 31,308	$ 35,893
Restricted cash and cash equivalents	1,990	891
Accounts receivable, net	6,424	3,259
Inventories, net	405	348
Prepaid expenses and other current assets	856	1,074
Total current assets	40,983	41,465
Property and equipment, net of accumulated depreciation of $18,379 and $18,243, respectively	4,556	4,609
Goodwill	2,116	2,116
Other intangible assets, net of accumulated amortization of $369 and $341, respectively	416	448
Restricted cash	0	270
Right-of-use operating lease assets	236	242
Other assets	811	824
Total assets	49,118	49,974
Current liabilities:
Accounts payable	2,348	1,561
Accrued liabilities:
Operating lease liabilities - current	118	113
Employee compensation	677	688
Other accrued liabilities	887	861
Total current liabilities	4,030	3,223
Operating lease liabilities - non-current	111	122
Deferred income taxes, net	139	139
Other liabilities	255	290
Total liabilities	4,535	3,774
Stockholders’ equity:
Common stock, $.01 par value, 40,000,000 shares authorized, 31,272,303 and 31,227,300 shares issued, and 30,296,297 and 30,263,791 shares outstanding, respectively	313	312
Additional paid-in capital	164,244	164,199
Accumulated deficit	(115,903)	(114,549)
Accumulated other comprehensive loss	(1,896)	(1,604)
Nil coupon perpetual loan notes	76	76
Treasury stock, at cost	(2,251)	(2,234)
Total stockholders’ equity	44,583	46,200
Total liabilities and stockholders’ equity	$ 49,118	$ 49,974