Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring basis - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Assets
Money market	$ 8,164,197	$ 7,639,866
Derivative assets	762,757	972,784
Total assets	8,926,954	8,612,650
Liabilities
Contingent consideration	1,781,667
Derivative liability	231,092	940,216
Total liabilities	2,012,759	940,216
Quoted Prices in Active Markets for Identical Items (Level 1)
Assets
Money market	8,164,197	7,639,866
Derivative assets	0	0
Total assets	8,164,197	7,639,866
Liabilities
Contingent consideration	0
Derivative liability	0	0
Total liabilities	0	0
Significant Other Observable Inputs (Level 2)
Assets
Money market	0	0
Derivative assets	762,757	972,784
Total assets	762,757	972,784
Liabilities
Contingent consideration	0
Derivative liability	231,092	940,216
Total liabilities	231,092	940,216
Significant Unobservable Inputs (Level 3)
Assets
Money market	0	0
Derivative assets	0	0
Total assets	0	0
Liabilities
Contingent consideration	1,781,667
Derivative liability	0	0
Total liabilities	$ 1,781,667	$ 0