Annual report pursuant to Section 13 and 15(d)

Revenue from Contracts with Customers - Performance Obligations (Details)

v3.19.3.a.u2
Revenue from Contracts with Customers - Performance Obligations (Details)
Dec. 31, 2019
USD ($)
Revenue from Contract with Customer [Abstract]  
Revenue, remaining performance obligation $ 2,249,970
Revenue, remaining performance obligation, percentage 28.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, remaining satisfaction, period 12 months