Income Taxes Components of income tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (loss) from continuing operations before income taxes
United States	$ (708)	$ 3,583	$ (4,355)
Canada	(823)	(2,431)	(1,479)
Income (loss) from continuing operations before income taxes	(1,531)	1,152	(5,834)
Current income tax expense (benefit):
U.S. Federal	97	(461)	(377)
U.S. state	(33)	75	79
Canada	3	1,241	525
Total	67	855	227
Deferred income tax expense (benefit):
Deferred Federal Income Tax Expense (Benefit)	0	0	0
Deferred State and Local Income Tax Expense (Benefit)	31	0	0
Deferred Foreign Income Tax Expense (Benefit)	0	0	0
Deferred Income Tax Expense (Benefit)	31	0	0
Total income tax expense (benefit):
Federal Income Tax Expense (Benefit), Continuing Operations	97	(461)	(377)
State and Local Income Tax Expense (Benefit), Continuing Operations	(2)	75	79
Foreign Income Tax Expense (Benefit), Continuing Operations	3	1,241	525
Income Tax Expense (Benefit)	$ 98	$ 855	$ 227