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Stockholders' Equity (Details 5)
 12 Months Ended
Dec. 31, 2017
USD ($)
Other General and Administrative Expense $ 436,000
Year 2018 [Member]  
Other General and Administrative Expense 211,000
Year 2019 [Member]  
Other General and Administrative Expense 144,000
Year 2020 [Member]  
Other General and Administrative Expense 69,000
Year 2021 [Member]  
Other General and Administrative Expense $ 12,000