Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 1,908,841	$ 2,357,130
Provision for doubtful accounts	898,357	268,990
Allowance for doubtful accounts receivable, uncollectible	$ 1,347,000	$ 48,000