Leases - Cash Flow Information (Details)	6 Months Ended
	Jun. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,373,309
Operating cash flows from finance leases	3,746
Financing cash flows from finance leases	77,507
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 6,440,016