Business Segment Data (Details) - Business Segment Data - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenues:
Revenues	$ 4,142,000	$ 4,789,000	$ 11,477,000	$ 15,756,000
Operating (loss) income:
Operating income (loss)	(662,000)	(583,000)	(1,861,000)	(265,000)
Interest expense, net	(183,000)	(110,000)	(521,000)	(382,000)
Gain on foreign currency remeasurement	60,000	181,000	1,000	241,000
Gain on forgiveness of PPP loan				824,000
Pension (expense) benefit	(62,000)	53,000	(187,000)	158,000
(Loss) income before income taxes	(847,000)	(459,000)	(2,568,000)	576,000
Income tax expense	(7,000)	(7,000)	(19,000)	(19,000)
Net (loss) income	(854,000)	(466,000)	(2,587,000)	557,000
Assets
Assets	10,085,000		10,085,000		$ 9,412,000
Operating Segments [Member]
Assets
Assets	10,079,000		10,079,000		9,364,000
Corporate, Non-Segment [Member]
Operating (loss) income:
Operating income (loss)	(403,000)	(346,000)	(1,352,000)	(1,178,000)
Assets
Assets	6,000		6,000		48,000
Digital Product Sales [Member]
Revenues:
Revenues	3,933,000	4,510,000	10,821,000	14,763,000
Digital Product Sales [Member] | Operating Segments [Member]
Revenues:
Revenues	3,933,000	4,510,000	10,821,000	14,763,000
Operating (loss) income:
Operating income (loss)	(357,000)	(385,000)	(839,000)	375,000
Assets
Assets	7,769,000		7,769,000		8,221,000
Digital Product Lease and Maintenance [Member]
Revenues:
Revenues	209,000	279,000	656,000	993,000
Digital Product Lease and Maintenance [Member] | Operating Segments [Member]
Revenues:
Revenues	209,000	279,000	656,000	993,000
Operating (loss) income:
Operating income (loss)	98,000	$ 148,000	330,000	$ 538,000
Assets
Assets	$ 2,310,000		$ 2,310,000		$ 1,143,000