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Common Shares (Public Offering) (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 9 Months Ended
Aug. 31, 2016
USD ($)
item
$ / shares
shares
Sep. 30, 2016
USD ($)
shares
Subsidiary, Sale of Stock [Line Items]    
Number of units issued 12,362,500  
Proceeds from issuance of common shares | $ $ 15,883 $ 15,883
Number of common shares in each unit | item 1  
Number of common shares to purchase each warrant 0.50  
Over-Allotment Option    
Subsidiary, Sale of Stock [Line Items]    
Number of units issued 1,612,500  
Warrants    
Subsidiary, Sale of Stock [Line Items]    
Number of common shares purchased for each warrant 1  
Issued (in shares) 6,514,625 6,514,625
Exercise price (in dollars per share) | $ / shares $ 1.92  
Period warrants are exercisable 36 months  
Fair value of warrants | $ $ 3,320  
Expected volatility (as a percent)   89.00%
Risk-free interest rate (as a percent)   0.86%
Expected term (in years)   3 years
Share price (in dollars per share) | $ / shares $ 1.13  
Warrants | Over-Allotment Option    
Subsidiary, Sale of Stock [Line Items]    
Issued (in shares) 333,375