Description of Business, Basis of Presentation and Summary of Significant Accounting Policies - Basic and Diluted Income Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net income (loss)	$ 2,203,826	$ (235,272)	$ 3,461,425	$ (4,447,933)
Denominator:
Weighted-average shares outstanding— basic (in shares)	75,648,621	72,753,487	75,250,562	72,369,619
Effect of dilutive securities (in shares)	2,859,938	0	3,405,553	0
Weighted-average shares outstanding— diluted (in shares)	78,508,559	72,753,487	78,656,115	72,369,619
Basic income (loss) per share (in dollars per share)	$ 0.03	$ 0.00	$ 0.05	$ (0.06)
Diluted income (loss) per share (in dollars per share)	$ 0.03	$ 0.00	$ 0.04	$ (0.06)