XML 96 R77.htm IDEA: XBRL DOCUMENT v3.19.1
COMMITMENTS AND CONTINGENCIES - Future Minimum Lease Payments Under All Non-Cancelable Operating Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Leases      
2019 $ 1,674    
2020 1,112    
2021 649    
2022 0    
2023 0    
Thereafter 0    
Total 3,435    
Rent expense      
Rent expense $ 2,100 $ 1,900 $ 1,400