Annual report pursuant to Section 13 and 15(d)

SELECTED FINANCIAL STATEMENT CAPTIONS - LIABILITIES (Details 1)

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SELECTED FINANCIAL STATEMENT CAPTIONS - LIABILITIES (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Other Long Term Liabilities [Line Items]    
Other long-term liabilities $ 34,470 $ 33,750
Other Long-Term Liabilities [Member]    
Other Long Term Liabilities [Line Items]    
Other long-term liabilities 17 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 $ 24,453 $ 23,242