Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Components of Accumulated Other Comprehensive Loss) (Details)

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Summary of Significant Accounting Policies (Components of Accumulated Other Comprehensive Loss) (Details)
 3 Months Ended
Mar. 31, 2018
USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]  
December 31, 2017 $ 49,170,727
March 31, 2018 47,485,221
Foreign Currency Translation [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
December 31, 2017 (625,000)
Net current period change 33,000
March 31, 2018 (592,000)
Unrealized (Loss)/Gain On Securities [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
December 31, 2017 12,000
Net current period change (6,000)
March 31, 2018 6,000
Accumulated Other Comprehensive Income (Loss) [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
December 31, 2017 (613,379)
Net current period change 27,000
March 31, 2018 $ (585,717)