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Equity Incentive Plans - Summary of Non-Vested RSU Activity (Details) - $ / shares
1 Months Ended 12 Months Ended
Nov. 30, 2018
Jul. 31, 2018
Jan. 31, 2017
Dec. 31, 2019
Service Based Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Shares, Beginning balance       85,609
Number of Shares, Vested       (85,609)
Weighted-Average Grant Date Fair Value Per Share, Beginning balance       $ 4.70
Weighted-Average Grant Date Fair Value Per Share, Vested       $ 4.70
Performance-Based Restricted Stock Units (PRSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Shares, Beginning balance       894,764
Number of Shares, Granted   903,374 161,865  
Number of Shares, Vested (125,895)     0
Number of Shares, Forfeited       (45,007)
Number of Shares, Ending balance       849,757
Weighted-Average Grant Date Fair Value Per Share, Beginning balance       $ 4.30
Weighted-Average Grant Date Fair Value Per Share, Forfeited       4.30
Weighted-Average Grant Date Fair Value Per Share, Ending balance       $ 4.30