Business Segment Data (Details) - Business Segment Data - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Revenues	$ 17,035,000	$ 14,399,000
Operating income (loss):
Operating loss	(451,000)	(4,046,000)
Interest expense, net	(504,000)	(940,000)
(Loss) gain on foreign currency remeasurement	(130,000)	225,000
Loss on extinguishment of debt	(193,000)
Gain on sale/leaseback transaction		11,000
Pension (expense) benefit	(83,000)	103,000
Loss before income taxes	(1,361,000)	(4,647,000)
Income tax expense	(41,000)	(47,000)
Net loss	(1,402,000)	(4,694,000)
Assets:
Assets	12,254,000	11,466,000
Depreciation and amortization:
Depreciation and amortization	668,000	952,000
Capital expenditures:
Capital expenditures	421,000	140,000
Digital Product Sales [Member]
Revenues:
Revenues	14,710,000	11,958,000
Digital Product Lease And Maintenance [Member]
Revenues:
Revenues	2,325,000	2,441,000
Operating Segments [Member]
Assets:
Assets	11,719,000	10,743,000
Operating Segments [Member] | Digital Product Sales [Member]
Revenues:
Revenues	14,710,000	11,958,000
Operating income (loss):
Operating loss	183,000	(1,744,000)
Assets:
Assets	8,204,000	7,689,000
Depreciation and amortization:
Depreciation and amortization	234,000	234,000
Capital expenditures:
Capital expenditures	376,000	140,000
Operating Segments [Member] | Digital Product Lease And Maintenance [Member]
Revenues:
Revenues	2,325,000	2,441,000
Operating income (loss):
Operating loss	1,752,000	1,062,000
Assets:
Assets	3,515,000	3,054,000
Depreciation and amortization:
Depreciation and amortization	427,000	706,000
Capital expenditures:
Capital expenditures	44,000
Corporate, Non-Segment [Member]
Operating income (loss):
Operating loss	(2,386,000)	(3,364,000)
Assets:
Assets	535,000	723,000
Depreciation and amortization:
Depreciation and amortization	7,000	12,000
Capital expenditures:
Capital expenditures	$ 1,000