Quarterly report pursuant to Section 13 or 15(d)

SELECTED FINANCIAL STATEMENT CAPTIONS - LIABILITIES (Details 1)

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SELECTED FINANCIAL STATEMENT CAPTIONS - LIABILITIES (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Other Long Term Liabilities [Line Items]      
Other long-term liabilities $ 36,434 $ 33,750 $ 35,330
Other Long-Term Liabilities [Member]      
Other Long Term Liabilities [Line Items]      
Other long-term liabilities 12 8  
Unearned Revenue [Member]      
Other Long Term Liabilities [Line Items]      
Other long-term liabilities 10,000 10,500  
Trade Discount [Member]      
Other Long Term Liabilities [Line Items]      
Other long-term liabilities $ 26,422 $ 23,242