Note 1 - Business Description and Significant Accounting Policies (Details Textual)	1 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Number of Operating Segments		2
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents		$ 4,965,000	$ 5,990,000
Certificates of Deposit, at Carrying Value		500,000	500,000
Accounts Receivable, Credit Loss Expense (Reversal)		2,000	(52,000)
Prepaid Expense and Other Assets, Current		118,000	243,000
Revenue from Contract with Customer, Including Assessed Tax		2,378,000	3,810,000
Excise and Sales Taxes		68,000	95,000
Cost, Direct Tax and License		74,000	101,000
Property, Plant and Equipment, Net		0	0
Intangible Assets, Net (Excluding Goodwill)		0	0
Operating Lease, Right-of-Use Asset		0	17,000
Property, Plant and Equipment, Disposals		3,000
Impairment of Intangible Assets, Finite-Lived		0	259,000
Goodwill		0	0
Operating Lease, Liability		17,000
Inventory Write-down	$ 533,000
Unusual or Infrequent Item, or Both, Insurance Proceeds		$ (0)	400,000
Inventory Theft [Member]
Unusual or Infrequent Item, or Both, Insurance Proceeds			400,000	$ 50,000
Unusual or Infrequent Item, or Both, Net (Gain) Loss			400,000	(483,000)
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Finite-Lived Intangible Asset, Useful Life (Year)		5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		10 years
Finite-Lived Intangible Asset, Useful Life (Year)		12 years
Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax		$ 156,000	516,000
Transferred at Point in Time [Member]
Revenue from Contract with Customer, Including Assessed Tax		2,222,000	3,294,000
Videoconferencing Services [Member]
Contract with Customer, Liability, Revenue Recognized		1,000	1,000
Revenue, Remaining Performance Obligation, Amount		36,000	158,000	$ 549,000
Visual Collaboration Products [Member]
Contract with Customer, Liability, Revenue Recognized		$ 132,000	$ 435,000
G P Communications [Member]
Subsidiary, Ownership Percentage, Parent		100.00%