Derivative Financial Instruments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency forward contracts outstanding	$ 0	$ 0
Interest and other income (loss)
Derivative Instruments, Gain (Loss) [Line Items]
Loss on derivative	52,248	108,976
Recurring
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments	$ 498,086	$ 445,838