Quarterly report pursuant to Section 13 or 15(d)

Construction Contract and Other Service Revenues (Details 1)

v3.20.1
Construction Contract and Other Service Revenues (Details 1) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues $ 13,681 $ 16,950
Construction    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 12,883 16,489
Design    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 542 252
Other    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 256 209
Guaranteed Maximum Price    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 5,044 12,356
Firm fixed price    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 5,072 2,325
Cost-plus fee    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 3,309 2,060
Other    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues $ 256 $ 209