Business Segment Data (Details) - Business Segment Data - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Revenues	$ 21,661,000	$ 11,350,000
Operating income (loss):
Operating income (loss)	(389,000)	(4,233,000)
Interest expense, net	(410,000)	(578,000)
Gain (loss) on foreign currency remeasurement	191,000	(18,000)
Gain on extinguishment of debt		77,000
Gain on forgiveness of PPP loan	824,000
Pension benefit (expense)	142,000	(181,000)
Income (loss) before income taxes	358,000	(4,933,000)
Income tax expense	(35,000)	(35,000)
Net income (loss)	323,000	(4,968,000)
Assets:
Assets	9,412,000	8,651,000
Depreciation and amortization:
Depreciation and amortization	439,000	495,000
Capital expenditures:
Capital expenditures	18,000
Digital Product Sales [Member]
Revenues:
Revenues	20,386,000	9,418,000
Digital Product Lease And Maintenance [Member]
Revenues:
Revenues	1,275,000	1,932,000
Operating Segments [Member]
Assets:
Assets	9,364,000	8,127,000
Operating Segments [Member] | Digital Product Sales [Member]
Revenues:
Revenues	20,386,000	9,418,000
Operating income (loss):
Operating income (loss)	394,000	(4,285,000)
Assets:
Assets	8,221,000	6,379,000
Depreciation and amortization:
Depreciation and amortization	252,000	249,000
Capital expenditures:
Capital expenditures	18,000
Operating Segments [Member] | Digital Product Lease And Maintenance [Member]
Revenues:
Revenues	1,275,000	1,932,000
Operating income (loss):
Operating income (loss)	799,000	1,282,000
Assets:
Assets	1,143,000	1,748,000
Depreciation and amortization:
Depreciation and amortization	186,000	245,000
Capital expenditures:
Capital expenditures
Corporate, Non-Segment [Member]
Operating income (loss):
Operating income (loss)	(1,582,000)	(1,230,000)
Assets:
Assets	48,000	524,000
Depreciation and amortization:
Depreciation and amortization	1,000	1,000
Capital expenditures:
Capital expenditures