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Stockholders' Equity (Narrative) (Details) - shares
Apr. 13, 2018
Mar. 31, 2018
Dec. 31, 2017
Class of Stock [Line Items]      
Preferred Stock, Shares Outstanding   0  
Preferred stock - shares authorized   50,000 50,000
Preferred stock - shares issued   0 0
Subsequent Event [Member]      
Class of Stock [Line Items]      
Common Shares Issued in Business Combination 1,152,711