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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Repurchase of Common Stock (Details) - shares
12 Months Ended
Feb. 21, 2021
Dec. 31, 2020
Dec. 31, 2019
Oct. 31, 2020
February 2021 Stock Repurchase Plan [Member] | Subsequent Event [Member]        
Equity, Class of Treasury Stock [Line Items]        
Stock Repurchase Program, Number of Shares Authorized to be Repurchased 560,000      
Stock Repurchase Program, Number of Shares Authorized to be Repurchased, Percentage of Shares Outstanding 5.00%      
Stock Repurchase Program, Period in Force 1 year      
October 2019, March 2020, and October 2020 Stock Repurchase Plans [Member]        
Equity, Class of Treasury Stock [Line Items]        
Stock Repurchase Program, Number of Shares Authorized to be Repurchased       1,854,922
Stock Repurchased During Period, Shares   1,276,869    
October 2020 Stock Repurchase Plan [Member]        
Equity, Class of Treasury Stock [Line Items]        
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased   84,266    
October 2019 Stock Repurchase Plan [Member]        
Equity, Class of Treasury Stock [Line Items]        
Stock Repurchased During Period, Shares     493,787