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Debt Obligations (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Debt Obligations    
Total debt $ 77,239 $ 76,918
Less-current portion (2,755) (3,279)
Total long-term portion of debt 74,484 73,639
Revolving credit facility    
Debt Obligations    
Total debt 51,000 50,000
Notes to former owners    
Debt Obligations    
Outstanding balance 26,150 26,813
Other debt    
Debt Obligations    
Total debt $ 89 $ 105