Plan of Restructuring (Details) - Restructuring cost by reportable segment (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Segmented Restructuring Balance	$ 43	$ 205
Segmented Restructuring Provision	49
Segmented Restructuring Payment and Other Adjustment	211
Digital Display Sales [Member]
Restructuring Cost and Reserve [Line Items]
Segmented Restructuring Balance	20	158
Segmented Restructuring Provision	1
Segmented Restructuring Payment and Other Adjustment	139
Digital Display Lease And Maintenance [Member]
Restructuring Cost and Reserve [Line Items]
Segmented Restructuring Balance	23	47
Segmented Restructuring Provision	48
Segmented Restructuring Payment and Other Adjustment	$ 72