Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Foreign Currency [Abstract]
Foreign currency translation adjustments		$ 567	$ 3,094	$ (2,969)
Translation Adjustment Functional to Reporting Currency, Tax Benefit (Expense)	[1]	0	0	0
Other Comprehensive Income (Loss), Net of Tax		567	3,094	(2,969)
Accumulated other comprehensive loss		$ 307	$ (260)	$ (3,354)	$ (385)

[1] A valuation allowance has been recognized against all deferred tax assets associated with losses generated by the Company’s Canadian operations, thereby resulting in no income taxes on other comprehensive income (loss).