Quarterly report pursuant to Section 13 or 15(d)

Construction Contract and Other Service Revenues - Narrative (Details)

v3.20.2
Construction Contract and Other Service Revenues - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation of Revenue [Line Items]        
Remaining performance obligations $ 70,500,000   $ 70,500,000  
Remaining performance obligation expected to be recognized during the remainder of year 20,000,000   20,000,000  
Construction Contract Revenue        
Disaggregation of Revenue [Line Items]        
Performance obligations satisfied or already satisfied 74,000 $ (14,000) 74,000 $ 18,000
Deferred incremental costs incurred $ 0 $ 0 $ 0 $ 0