Summary of Significant Accounting Policies (Components of Accumulated Other Comprehensive Loss) (Details)	3 Months Ended
	Mar. 31, 2020 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	$ 47,392,282
BALANCE	48,962,702
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	(709,000)
Net current period change	(132,000)
BALANCE	(841,000)
Unrealized gain (loss) on securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	11,000
Net current period change	(14,000)
BALANCE	(3,000)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	(697,664)
Net current period change	(146,000)
BALANCE	$ (844,219)