Quarterly report pursuant to Section 13 or 15(d)

LIABILITIES AND LONG-TERM DEBT LIABILITIES AND LONG-TERM DEBT - Schedule of Carrying Amounts of and Issuance Costs of Debt (Details)

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LIABILITIES AND LONG-TERM DEBT LIABILITIES AND LONG-TERM DEBT - Schedule of Carrying Amounts of and Issuance Costs of Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Line of Credit Facility [Line Items]    
Debt issuance costs $ (785) $ (830)
Total long-term debt 103,434 102,482
Less current portion including loan fees 4,194 4,194
Total long-term debt, less current portion including loan fees 99,240 98,288
Acquisition loan    
Line of Credit Facility [Line Items]    
Total debt, gross 84,219 85,312
Revolving facility    
Line of Credit Facility [Line Items]    
Total debt, gross $ 20,000 $ 18,000