Quarterly report pursuant to Section 13 or 15(d)

SELECTED FINANCIAL STATEMENT CAPTIONS - LIABILITIES (Details 2)

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SELECTED FINANCIAL STATEMENT CAPTIONS - LIABILITIES (Details 2) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Other Long Term Liabilities [Line Items]    
Other long-term liabilities $ 32,275 $ 34,470
Trade Discount [Member]    
Other Long Term Liabilities [Line Items]    
Other long-term liabilities 22,251 24,453
Unearned Revenue [Member]    
Other Long Term Liabilities [Line Items]    
Other long-term liabilities 10,000 10,000
Other Long-Term Liabilities [Member]    
Other Long Term Liabilities [Line Items]    
Other long-term liabilities $ 24 $ 17