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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 19, 2014
Amortization of Intangible Assets $ 320 $ 328  
Convertible Subordinated Notes [Member]      
Stated interest rate percentage     2.75%
Senior Notes [Member] | Senior Note Two [Member]      
Stated interest rate percentage 6.625%