Note 12 - Revenues - Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net revenues	$ 9,445,000	$ 10,483,000
Device Revenue [Member]
Net revenues	6,863,000	8,531,000
Service [Member]
Net revenues	1,745,000	1,638,000
Other [Member]
Net revenues	837,000	314,000
Device [Member] | AXP [Member]
Net revenues	5,202,000	6,391,000
Device [Member] | AXP [Member] | Device Revenue [Member]
Net revenues	4,970,000	5,911,000
Device [Member] | AXP [Member] | Service [Member]
Net revenues	232,000	480,000
Device [Member] | BioArchive [Member]
Net revenues	2,845,000	2,215,000
Device [Member] | BioArchive [Member] | Device Revenue [Member]
Net revenues	1,484,000	1,247,000
Device [Member] | BioArchive [Member] | Service [Member]
Net revenues	1,361,000	968,000
Device [Member] | X-Series [Member]
Net revenues	1,052,000	1,129,000
Device [Member] | X-Series [Member] | Device Revenue [Member]
Net revenues	121,000	654,000
Device [Member] | X-Series [Member] | Service [Member]
Net revenues	152,000	190,000
Device [Member] | X-Series [Member] | Other [Member]
Net revenues	779,000	285,000
Device [Member] | Other Subsegments [Member]
Net revenues	346,000	748,000
Device [Member] | Other Subsegments [Member] | Device Revenue [Member]
Net revenues	288,000	719,000
Device [Member] | Other Subsegments [Member] | Other [Member]
Net revenues	58,000	29,000
UNITED STATES
Net revenues	6,029,000	6,641,000
CHINA
Net revenues	98,000	1,984,000
UNITED ARAB EMIRATES
Net revenues	570,000
VIET NAM
Net revenues	225,000	515,000
All Other Countries [Member]
Net revenues	$ 2,523,000	$ 1,343,000