Business Segment Data (Details) - Business Segment Data - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Revenues:
Revenues	$ 3,665,000	$ 2,586,000
Operating (loss) income:
Operating income (loss)	(220,000)	(620,000)
Interest expense, net	(142,000)	(103,000)
Loss on foreign currency remeasurement	(16,000)	(36,000)
Gain on extinguishment of debt		77,000
Gain on forgiveness of PPP loan	824,000
Pension benefit	53,000	67,000
Income (loss) before income taxes	499,000	(615,000)
Income tax expense	(6,000)	(6,000)
Net income (loss)	493,000	(621,000)
Assets
Assets	9,773,000	8,651,000	$ 8,651,000
Digital Product Sales [Member]
Revenues:
Revenues	3,237,000	2,093,000
Digital Product Lease and Maintenance [Member]
Revenues:
Revenues	428,000	493,000
Operating Segments [Member]
Assets
Assets	9,390,000	8,127,000
Operating Segments [Member] | Digital Product Sales [Member]
Revenues:
Revenues	3,237,000	2,093,000
Operating (loss) income:
Operating income (loss)	(71,000)	(626,000)
Assets
Assets	7,712,000	6,379,000
Operating Segments [Member] | Digital Product Lease and Maintenance [Member]
Revenues:
Revenues	428,000	493,000
Operating (loss) income:
Operating income (loss)	257,000	319,000
Assets
Assets	1,678,000	1,748,000
Corporate, Non-Segment [Member]
Operating (loss) income:
Operating income (loss)	(406,000)	(313,000)
Assets
Assets	$ 383,000	$ 524,000