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Debt Obligations (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Debt Obligations    
Total debt $ 76,918 $ 60,539
Less—current portion (3,279) (613)
Total long-term portion of debt 73,639 59,926
Revolving credit facility    
Debt Obligations    
Total debt 50,000 45,000
Notes to former owners    
Debt Obligations    
Outstanding balance 26,813 15,325
Other debt    
Debt Obligations    
Total debt $ 105 $ 214