Business Segment Data (Details) - Business Segment Data - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Revenues	$ 15,552,000	$ 21,661,000
Operating (loss) income:
Operating income (loss)	(2,985,000)	(389,000)
Interest expense, net	(702,000)	(410,000)
(Loss) gain on foreign currency remeasurement	(60,000)	191,000
Gain on forgiveness of PPP loan		824,000
Pension (expense) benefit	(289,000)	142,000
(Loss) income before income taxes	(4,036,000)	358,000
Income tax expense	(31,000)	(35,000)
Net (loss) income	(4,067,000)	323,000
Assets:
Assets	8,330,000	9,412,000
Depreciation and amortization:
Depreciation and amortization	378,000	439,000
Capital expenditures:
Capital expenditures	327,000	18,000
Operating Segments [Member]
Assets:
Assets	8,145,000	9,364,000
Corporate, Non-Segment [Member]
Operating (loss) income:
Operating income (loss)	(1,898,000)	(1,582,000)
Assets:
Assets	185,000	48,000
Depreciation and amortization:
Depreciation and amortization	5,000	1,000
Capital expenditures:
Capital expenditures	43,000
Digital Product Sales [Member]
Revenues:
Revenues	14,683,000	20,386,000
Digital Product Sales [Member] | Operating Segments [Member]
Revenues:
Revenues	14,683,000	20,386,000
Operating (loss) income:
Operating income (loss)	(1,528,000)	394,000
Assets:
Assets	7,502,000	8,221,000
Depreciation and amortization:
Depreciation and amortization	259,000	252,000
Capital expenditures:
Capital expenditures	284,000	18,000
Digital Product Lease and Maintenance [Member]
Revenues:
Revenues	869,000	1,275,000
Digital Product Lease and Maintenance [Member] | Operating Segments [Member]
Revenues:
Revenues	869,000	1,275,000
Operating (loss) income:
Operating income (loss)	441,000	799,000
Assets:
Assets	643,000	1,143,000
Depreciation and amortization:
Depreciation and amortization	144,000	186,000
Capital expenditures:
Capital expenditures