Note 10 - Segment Information - Net Sales by Geographic Area (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Net sales		$ 7,560	$ 9,477	$ 24,369	$ 30,027
UNITED STATES
Net sales		168	302	622	887
CANADA
Net sales		70	128	231	359
Peru and Colombia [Member]
Net sales		289	301	880	870
HONG KONG
Net sales	[1]	6,296	7,715	20,196	24,842
CHINA
Net sales		136	237	573	690
TAIWAN
Net sales		283	331	895	1,049
JAPAN
Net sales		24	111	102	257
Malaysia and Singapore [Member]
Net sales		44	67	132	199
Russia and Kazakhstan [Member]
Net sales		82	105	238	303
Europe [Member]
Net sales		122	130	374	400
Other Foreign Countries [Member]
Net sales		$ 46	$ 50	$ 126	$ 171

[1] Substantially all of the Company's Hong Kong revenues are derived from the sale of products that are delivered to members in China. See “Item 1A. Risk Factors” in our most recent Annual Report on Form 10-K.