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Income Taxes (Details Textual)
12 Months Ended
Dec. 31, 2018
USD ($)
Income Taxes (Textual)  
Open tax years 2009 through 2017
Federal [Member]  
Income Taxes (Textual)  
Operating loss carryforwards $ 59,700,000
Operating loss carryforwards, expiration date Dec. 31, 2028
State [Member]  
Income Taxes (Textual)  
Operating loss carryforwards $ 20,000,000
Operating loss carryforwards, expiration date Dec. 31, 2030
Foreign [Member]  
Income Taxes (Textual)  
Operating loss carryforwards $ 4,700,000