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Equity Incentive Plan RSAs Outstanding (Details) - Restricted Stock [Member] - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, Number, period start 0 0
Outstanding, Weighted Average Grant Date Fair Value, period start $ 0.00 $ 0.00
Grants in Period 340,942 6,917
Grants in Period, Weighted Average Grant Date Fair Value $ 6.33 $ 26.54
Vested and Released (340,942) (6,917)
Vested in Period, Weighted Average Grant Date Fair Value $ 6.33 $ 26.54
Outstanding, Number, period end 0 0
Outstanding, Weighted Average Grant Date Fair Value, period end $ 0.00 $ 0.00
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid $ 2.2 $ 0.2