Business Segment Data (Details) - Business Segment Data - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenues:
Revenues	$ 7,302,000	$ 2,887,000	$ 10,967,000	$ 5,473,000
Operating income (loss):
Operating income (loss)	538,000	(1,043,000)	318,000	(1,663,000)
Interest expense, net	(130,000)	(157,000)	(272,000)	(260,000)
Gain (loss) on foreign currency remeasurement	76,000	(36,000)	60,000	(72,000)
Gain on extinguishment of debt				77,000
Gain on forgiveness of PPP loan			824,000
Pension benefit	52,000	67,000	105,000	134,000
Income (loss) before income taxes	536,000	(1,169,000)	1,035,000	(1,784,000)
Income tax expense	(6,000)	(6,000)	(12,000)	(12,000)
Net income (loss)	530,000	(1,175,000)	1,023,000	(1,796,000)
Assets
Assets	10,565,000		10,565,000		$ 8,651,000
Digital Product Sales [Member]
Revenues:
Revenues	7,016,000	2,396,000	10,253,000	4,489,000
Digital Product Lease and Maintenance [Member]
Revenues:
Revenues	286,000	491,000	714,000	984,000
Operating Segments [Member]
Assets
Assets	10,457,000		10,457,000		8,127,000
Operating Segments [Member] | Digital Product Sales [Member]
Revenues:
Revenues	7,016,000	2,396,000	10,253,000	4,489,000
Operating income (loss):
Operating income (loss)	831,000	(1,095,000)	760,000	(1,721,000)
Assets
Assets	8,956,000		8,956,000		6,379,000
Operating Segments [Member] | Digital Product Lease and Maintenance [Member]
Revenues:
Revenues	286,000	491,000	714,000	984,000
Operating income (loss):
Operating income (loss)	133,000	323,000	390,000	642,000
Assets
Assets	1,501,000		1,501,000		1,748,000
Corporate, Non-Segment [Member]
Operating income (loss):
Operating income (loss)	(426,000)	$ (271,000)	(832,000)	$ (584,000)
Assets
Assets	$ 108,000		$ 108,000		$ 524,000