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Stockholders' Equity - Summary of Warrant Activity (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
Warrants outstanding [Roll Forward]  
Outstanding, beginning of period (in shares) | shares 1,826,608
Warrants issued (in shares) | shares 2,601,900
Warrants exercised (in shares) | shares (191,803)
Warrants expired (in shares) | shares (18)
Outstanding, end of period (in shares) | shares 4,236,687
Exercisable, end of period (in shares) | shares 4,236,687
Warrants, Exercise Price per Share [Roll Forward]  
Outstanding, beginning of period (in dollars per share) | $ / shares $ 23.04
Outstanding, ending of period (in dollars per share) | $ / shares 9.13
Warrants issued (in dollars per share) | $ / shares 8.55
Warrants exercised (in dollars per share) | $ / shares 9.69
Warrants expired (in dollars per share) | $ / shares 10.00
Exercisable, (in dollars per share) | $ / shares $ 9.13
Weighted average remaining life 4 years 2 months 12 days
Weighted average remaining life, Exercisable 4 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding | $ $ 37,261
Aggregate Intrinsic Value, Exercisable | $ $ 37,261