XML 60 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1
Long-Term Debt Obligations - Future Payments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Future principal payments of long-term debt      
2018 $ 613    
2019 626    
2020 7,150    
2021 52,150    
Total debt 60,539 $ 2,811  
Interest expense      
Interest expense on notes to former owners 365 70 $ 25
Interest expense on borrowings and unused commitment fees 1,862 1,251 692
Letter of credit fees 553 657 719
Amortization of debt financing costs 376 367 317
Total $ 3,156 $ 2,345 $ 1,753