Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 11,939	$ 8,510
Short-term investments	12,942	10,184
Accounts receivable, less current expected credit loss of $108 and $106, respectively	5,355	9,368
Inventories, net	373	397
Prepaid expenses and other current assets	1,335	1,160
Total current assets	31,944	29,619
Property and equipment, net	4,739	5,084
Goodwill	2,116	2,116
Other intangible assets, net	646	327
Right-of-use operating lease assets	536	585
Long-term investments	6,991	10,875
Other assets	207	191
Total assets	47,179	48,797
Current liabilities:
Accounts payable	3,242	2,915
Accrued liabilities:
Operating lease liabilities - current	89	77
Employee compensation	1,308	1,248
Other accrued liabilities	1,634	1,615
Total current liabilities	6,273	5,855
Operating lease liabilities - non-current	491	548
Deferred income taxes	187	176
Other liabilities	296	263
Total liabilities	7,247	6,842
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock, $.01 par value, 40,000,000 shares authorized, 32,281,179 and 31,767,329 shares issued, and 31,074,438 and 30,708,273 shares outstanding in 2025 and 2024, respectively	322	317
Additional paid-in capital	165,616	165,295
Accumulated deficit	(121,796)	(119,472)
Accumulated other comprehensive loss	(1,718)	(1,915)
Nil coupon perpetual loan notes	76	76
Treasury stock, at cost (Note 5)	(2,568)	(2,346)
Total stockholders’ equity	39,932	41,955
Total liabilities and stockholders’ equity	$ 47,179	$ 48,797