Annual report pursuant to Section 13 and 15(d)

Capital Stock - Summary of Common Stock Warrants Outstanding (Details)

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Capital Stock - Summary of Common Stock Warrants Outstanding (Details) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Warrants    
Warrant outstanding (in shares) 19,426 28,489
Common stock warrant, Exercise price $66.20 per share, Issued February 2015    
Warrants    
Exercise price of warrants (in dollars per share)   $ 66.20
Warrant outstanding (in shares)   9,063
Common stock warrant, Exercise Price $15.40 per share, Issued February 2016    
Warrants    
Exercise price of warrants (in dollars per share) $ 15.40 $ 15.40
Warrant outstanding (in shares) 8,249 8,249
Common stock warrant, Exercise price $23.69 per share, Issued May 2018    
Warrants    
Exercise price of warrants (in dollars per share) $ 23.69 $ 23.69
Warrant outstanding (in shares) 6,332 6,332
Common stock warrant, Exercise price $14.71 per share, Issued March 2019    
Warrants    
Exercise price of warrants (in dollars per share) $ 14.71 $ 14.71
Warrant outstanding (in shares) 4,845 4,845