Quarterly report pursuant to Section 13 or 15(d)

REVENUE - Disaggregation of revenue (Details)

v3.20.1
REVENUE - Disaggregation of revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation of revenue    
Revenue $ 66,147 $ 50,652
Canada    
Disaggregation of revenue    
Revenue 8,500 1,449
United States    
Disaggregation of revenue    
Revenue 57,647 49,204
Cost-plus reimbursement contracts    
Disaggregation of revenue    
Revenue 60,296 43,503
Fixed-price contracts    
Disaggregation of revenue    
Revenue $ 5,851 $ 7,149