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Incentive Plan - Summary of Non-Vested RSU Grants (Details) - Restricted stock
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Number of Restricted Stock Units  
Non-vested at beginning of period (in shares) | shares 191,302
Granted during period (in shares) | shares 653,160
Vested during period (in shares) | shares (73,976)
Forfeited during period (in shares) | shares (197,420)
Non-vested at end of period (in shares) | shares 573,066
Weighted Average Grant Date, Fair Value Per Share  
Non-vested at beginning of period (in dollars per share) | $ / shares $ 16.58
Granted during period (in dollars per share) | $ / shares 2.53
Vested during period (in dollars per share) | $ / shares 16.17
Forfeited during period (in dollars per share) | $ / shares 5.43
Non-vested at end of period (in dollars per share) | $ / shares $ 4.46