Summary of Significant Accounting Policies - Patent and Income Tax (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Summary of Significant Accounting Policies
Patent expenses	$ 131,000	$ 20,000	$ 169,000	$ 160,000
Income Taxes
Valuation allowance on deferred tax assets (as a percent)			100.00%