Quarterly report pursuant to Section 13 or 15(d)

Revenue - Performance Obligations and Contract Balances (Details)

v3.20.1
Revenue - Performance Obligations and Contract Balances (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]      
Contract assets $ 0 $ 0 $ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Remaining performance obligation $ 78,800,000    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue recognition period 1.6 years