Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 24,082	$ 35,893
Restricted cash and cash equivalents	0	891
Short-term investments	2,469	0
Accounts receivable, net	6,658	3,259
Inventories, net	391	348
Prepaid expenses and other current assets	696	1,074
Total current assets	34,296	41,465
Property and equipment, net of accumulated depreciation of $18,425 and $18,243, respectively	4,505	4,609
Goodwill	2,116	2,116
Other intangible assets, net of accumulated amortization of $389 and $341, respectively	410	448
Restricted cash	0	270
Right-of-use operating lease assets	225	242
Long-term investments	7,339	0
Other assets	791	824
Total assets	49,682	49,974
Current liabilities:
Accounts payable	2,626	1,561
Accrued liabilities:
Operating lease liabilities - current	125	113
Employee compensation	855	688
Other accrued liabilities	768	861
Total current liabilities	4,374	3,223
Operating lease liabilities - non-current	94	122
Deferred income taxes, net	139	139
Other liabilities	243	290
Total liabilities	4,850	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	164,334	164,199
Accumulated deficit	(115,589)	(114,549)
Accumulated other comprehensive loss	(2,051)	(1,604)
Nil coupon perpetual loan notes	76	76
Treasury stock, at cost	(2,251)	(2,234)
Total stockholders’ equity	44,832	46,200
Total liabilities and stockholders’ equity	$ 49,682	$ 49,974