Business Segment Data (Details) - Business Segment Data - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Revenues	$ 14,399	$ 24,443
Operating (loss) income:
Operating loss	(4,046)	(2,881)
Interest expense, net	(940)	(708)
Gain (loss) on foreign currency remeasurement	225	(178)
Gain on sale/leaseback transaction	11	132
Pension benefit	103	35
Loss before income taxes	(4,647)	(3,600)
Income tax (expense) benefit	(47)	751
Net loss	(4,694)	(2,849)
Assets:
Assets	11,466	14,984
Depreciation and amortization:
Depreciation and amortization	952	1,301
Capital expenditures:
Capital expenditures	140	222
Digital Product Sales [Member]
Revenues:
Revenues	11,958	22,093
Digital Product Lease And Maintenance [Member]
Revenues:
Revenues	2,441	2,350
Operating Segments [Member]
Assets:
Assets	10,743	14,237
Operating Segments [Member] | Digital Product Sales [Member]
Revenues:
Revenues	11,958	22,093
Operating (loss) income:
Operating loss	(1,744)	(149)
Assets:
Assets	7,689	9,722
Depreciation and amortization:
Depreciation and amortization	234	176
Capital expenditures:
Capital expenditures	140	190
Operating Segments [Member] | Digital Product Lease And Maintenance [Member]
Revenues:
Revenues	2,441	2,350
Operating (loss) income:
Operating loss	1,062	653
Assets:
Assets	3,054	4,515
Depreciation and amortization:
Depreciation and amortization	706	1,105
Capital expenditures:
Capital expenditures		32
Corporate, Non-Segment [Member]
Operating (loss) income:
Operating loss	(3,364)	(3,385)
Assets:
Assets	723	747
Depreciation and amortization:
Depreciation and amortization	12	20
Capital expenditures:
Capital expenditures