Commitments and Contingencies (Narrative) (Details) $ in Millions		3 Months Ended
	Jan. 09, 2017 shareholder	Mar. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Option to extend, term		5 years
Rent expense		$ 0.8
Variable lease cost		0.2
Lease liability, current		$ 1.9
Weighted-average remaining lease term		7 years 7 months
Weighted-average discount rate		22.10%
Number of shareholders in litigation | shareholder	2
Minimum
Lessee, Lease, Description [Line Items]
Term of contract		3 years
Severance payment, prior to change in control		6 months
Severance payment, period following change in control		18 months
Maximum
Lessee, Lease, Description [Line Items]
Term of contract		9 years
Severance payment, prior to change in control		18 months
Severance payment, period following change in control		24 months