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Equity Incentive Plan RSUs Outstanding (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, Number, period start 53,004 125,969
Outstanding, Weighted Average Grant Date Fair Value, period start $ 31.21 $ 39.12
Grants in Period 100,000 50
Grants in Period, Weighted Average Grant Date Fair Value $ 2.51 $ 20.00
Vested and Released (131,541) (71,579)
Vested in Period, Weighted Average Grant Date Fair Value $ 9.68 $ 50.88
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (665) (1,436)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 64.95 $ 77.80
Outstanding, Number, period end 20,798 53,004
Outstanding, Weighted Average Grant Date Fair Value, period end $ 4.99 $ 31.21