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Subsequent Event (Narrative) (Details) - USD ($)
9 Months Ended
Nov. 01, 2018
Sep. 30, 2018
Chief Financial Officer [Member]    
Subsequent Event [Line Items]    
Officers compensation   $ 1
Chief Executive Officer [Member]    
Subsequent Event [Line Items]    
Officers compensation   $ 1
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Fee required upon termination of merger agreement under certain specified circumstances $ 43,000,000  
Subsequent Event [Member] | Chief Financial Officer [Member] | Deferred Bonus [Member]    
Subsequent Event [Line Items]    
Officers cash bonus 617,500  
Subsequent Event [Member] | Chief Executive Officer [Member] | Deferred Bonus [Member]    
Subsequent Event [Line Items]    
Officers cash bonus $ 1,030,000  
Restricted Stock Units (RSUs) [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Outstanding shares at merger, amount per share converted to cash without interest $ 8.00