Summary of Significant Accounting Policies - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Net income (loss)	$ (116,295)	$ (4,334,322)	$ 686,730	$ (3,334,653)
Cumulative dividend on convertible preferred stock	(361,447)	(337,963)	(1,072,553)	(1,070,812)
Net loss attributable to common stockholders	$ (477,742)	$ (4,672,285)	$ (385,823)	$ (4,405,465)
Weighted average number of common shares and equivalents:	59,008,219	22,750,405	49,733,553	22,551,496
Basic EPS	$ (0.01)	$ (0.21)	$ (0.01)	$ (0.20)
Diluted EPS	$ (0.01)	$ (0.21)	$ (0.01)	$ (0.20)