Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income tax expense		$ 3,000	$ 800	$ 7,000
Percentage of income tax expense on pre-tax loss			(0.0076%)
Pre-tax loss	$ (1,828,000)	$ (6,772,000)	$ (10,518,000)	$ (12,437,000)
Federal statutory rate (as a percent)			35.00%