Business Segment Data (Details) - Business Segment Data - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenues:
Revenues	$ 4,535	$ 3,077
Operating income (loss):
Operating Income (Loss)	139	(1,096)
Interest expense, net	(196)	(174)
Gain (loss) on foreign currency remeasurement	72	(27)
Gain on sale leaseback transaction	11	33
Pension benefit	34	9
Income (loss) before income taxes	60	(1,255)
Income tax expense
Net income (loss)	60	(1,255)
Assets
Assets	13,733		$ 14,984
Digital Product Sales [Member]
Revenues:
Revenues	3,948	2,580
Digital Product Lease And Maintenance [Member]
Revenues:
Revenues	587	497
Operating Segments [Member]
Assets
Assets	13,208		14,237
Operating Segments [Member] | Digital Product Sales [Member]
Revenues:
Revenues	3,948	2,580
Operating income (loss):
Operating Income (Loss)	560	(476)
Assets
Assets	9,125		9,722
Operating Segments [Member] | Digital Product Lease And Maintenance [Member]
Revenues:
Revenues	587	497
Operating income (loss):
Operating Income (Loss)	290	71
Assets
Assets	4,083		4,515
Corporate, Non-Segment [Member]
Operating income (loss):
Operating Income (Loss)	(711)	$ (691)
Assets
Assets	$ 525		$ 747