Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 27,000	$ 25,000	$ 94,000	$ 71,000
Deferred tax benefit			0
Unrecognized income tax benefits, interest and penalties accrued	$ 0		$ 0		$ 0