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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Taxes [Line Items]
Income tax	$ 980	$ 995
Pre-tax income	$ 2,299	$ 3,792
Effective tax rate	(42.60%)	26.20%	35.00%
Percentace of increase to effective income tax expense	12.00%
Provisional expense for the GILTI Tax	$ 100
Blended tax rate	24.66%
State income tax	3.66%
Canada [Member]
Income Taxes [Line Items]
Effective tax rate	27.00%
Tax Act [Member]
Income Taxes [Line Items]
Income tax	$ 300
U.S. Federal income tax statutory rate	21.00%

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