Components of Income (Loss) Before Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Pre-tax income (loss) U.S.	$ 1,896,000	$ (33,452,000)	$ (34,156,000)
Total pre-tax income (loss)	1,896,000	(33,452,000)	(34,156,000)
Current Federal Tax Expense (Benefit)	2,000	0	0
Current State and Local Tax Expense (Benefit)	0	0	0
Current Foreign Tax Expense (Benefit)	0	0	0
Current Income Tax Expense (Benefit)	2,000	0	0
Deferred Federal Income Tax Expense (Benefit)	3,000	0	0
Deferred State and Local Income Tax Expense (Benefit)	0	0	0
Deferred Foreign Income Tax Expense (Benefit)	0	0	0
Deferred Income Tax Expense (Benefit)	3,000	0	0
Income Tax Expense (Benefit)	5,000	0	0
United States
Income Taxes [Line Items]
Pre-tax income (loss) U.S.	3,981,000	(33,452,000)	(34,156,000)
Canada
Income Taxes [Line Items]
Pre-tax income (loss) Canada	$ (2,085,000)	$ 0	$ 0