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DEBT (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 05, 2021
Jun. 30, 2021
May 31, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Jul. 31, 2021
May 31, 2015
Debt Instrument [Line Items]                  
Loss on extinguishment of debt       $ 0 $ 610,000 $ 1,998,000 $ 610,000    
Revolving Credit Facility | 2015 Credit Agreement | Comerica Bank | Line of Credit                  
Debt Instrument [Line Items]                  
Extinguishment of debt, amount $ 5,400,000                
Revolving Credit Facility | Revolving Credit Agreement | East West Bank | Line of Credit                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity 130,000,000 $ 6,000,000   $ 130,000,000   130,000,000   $ 12,000,000.0  
Repayments of lines of credit     $ 63,200,000            
Debt extinguishment, fee   $ 1,300,000              
Debt extinguishment, fee, percentage of outstanding commitment   1.00%              
Write off of deferred debt issuance cost           700,000      
Loss on extinguishment of debt           $ 2,000,000      
Letter of Credit | 2015 Credit Agreement | Comerica Bank | Line of Credit                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity                 $ 4,000,000
Letter of Credit | Revolving Credit Agreement | East West Bank | Line of Credit                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity $ 20,000,000                
Bridge Loan | 2015 Credit Agreement | Comerica Bank | Line of Credit                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity                 $ 6,000,000