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Stockholders' Equity (Warrants Outstanding to Purchase Common Stock) (Parenthetical) (Details)
In Thousands, except Per Share data, unless otherwise specified
 1 Months Ended
Mar. 31, 2014
Apr. 30, 2010
Private Placement [Member]
USD ($)
Apr. 30, 2010
Private Placement [Member]
CAD
Nov. 22, 2013
Nonbroker Rights Offering [Member]
USD ($)
Nov. 22, 2013
Nonbroker Rights Offering [Member]
CAD
Mar. 29, 2011
Nonbroker Rights Offering [Member]
USD ($)
Mar. 29, 2011
Nonbroker Rights Offering [Member]
CAD
Class of Warrant or Right [Line Items]              
Issuance of stock   240,066 240,066 4,000 4,000 84,559 84,559
Issuance of stock, price per share     0.03   0.50   0.03
Proceeds from issuance of unit   $ 7,200   $ 1,600   $ 2,547  
Common shares issuable upon exercise of outstanding warrants 22,035 18 18     18 18
Warrant exercise price   1.44 1.44 0.40 0.40 1.44 1.44
Warrants, term   5 years 5 years 5 years 5 years 5 years 5 years