Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Summary of Significant Accounting Policies
Net loss	$ (948,000)	$ (12,469,000)	$ (2,528,000)	$ (2,387,000)	$ (2,258,000)	$ (2,144,000)	$ (2,471,000)	$ (2,683,000)	$ (18,331,479)	$ (9,555,601)
Weighted average common shares outstanding - basic and diluted									33,394,285	28,210,648
Basic and diluted net loss per share	$ (0.03)	$ (0.35)	$ (0.08)	$ (0.08)	$ (0.08)	$ (0.07)	$ (0.09)	$ (0.10)	$ (0.55)	$ (0.34)