Summary of Significant Accounting Policies (Components of Accumulated Other Comprehensive Loss) (Details)	6 Months Ended
	Jun. 30, 2019 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	$ 41,653,127
BALANCE	44,773,443
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	(764,000)
Net current period change	(20,000)
BALANCE	(784,000)
Unrealized gain on securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	13,000
Net current period change	1,000
BALANCE	14,000
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	(751,293)
Net current period change	(19,000)
BALANCE	$ (769,938)