Summary of Significant Accounting Policies - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Net income (loss)	$ 43,748	$ (116,295)	$ (3,506,790)	$ 686,730
Cumulative dividend on convertible preferred stock	(360,647)	(361,447)	(1,071,351)	(1,072,553)
Net loss attributable to common stockholders	$ (316,899)	$ (477,742)	$ (4,578,141)	$ (385,823)
Weighted average number of common shares and equivalents:	64,294,153	59,008,219	61,405,083	49,733,553
Basic EPS	$ (0.00)	$ (0.01)	$ (0.07)	$ (0.01)
Diluted EPS	$ (0.00)	$ (0.01)	$ (0.07)	$ (0.01)