Commitments and Contingencies - Employment Agreements and Retention Plan (Details)	12 Months Ended
	Dec. 31, 2019
Minimum
Loss Contingencies [Line Items]
Severance payment period prior to change in control	6 months
Severance payment period following change in control	18 months
Maximum
Loss Contingencies [Line Items]
Severance payment period prior to change in control	18 months
Severance payment period following change in control	24 months