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Fair Value Measurements (Details Narrative)
$ in Thousands
Sep. 30, 2021
USD ($)
integer
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Fair Value Disclosures [Abstract]      
Number of corporate bonds | integer 2    
Unrealized gain $ 16    
Amortized cost of investments 4,299    
Carrying amount of bonds 4,315 $ 75,609  
Fair value of bonds 4,315    
Carrying amount of long-term debt 178,371   $ 89,027
Fair value of long-term debt $ 173,634   $ 95,138