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Stockholders' Equity (Warrants Outstanding to Purchase Common Stock) (Details)
shares in Thousands
9 Months Ended
Sep. 30, 2017
$ / shares
shares
Class of Warrant or Right [Line Items]  
Common shares issuable upon exercise of outstanding warrants 1,362
Inverstor warrants one  
Class of Warrant or Right [Line Items]  
Common shares issuable upon exercise of outstanding warrants 1,312
Exercise price in CAD/USD Dollars | $ / shares $ 1.5
Expiration Date Nov. 22, 2018
Investor warrants two  
Class of Warrant or Right [Line Items]  
Common shares issuable upon exercise of outstanding warrants 50
Exercise price in CAD/USD Dollars | $ / shares $ 3.00
Expiration Date Feb. 02, 2019