ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases
Operating Lease Cost (Cost resulting from lease payments)	$ 3,335	$ 3,153	$ 6,549	$ 6,305
Variable Lease Cost (Cost excluded from lease payments)	10	34	20	74
Total Lease Cost	3,345	3,187	6,569	6,379
Operating Lease - Operating Cash Flows (Fixed Payments)	3,419	3,243	6,750	6,650
Operating Lease - Operating Cash Flows (Liability Reduction)	$ 2,248	$ 2,045	$ 4,422	$ 4,182
Weighted Average Lease Term - Operating Leases	5 years 2 months 26 days	5 years 4 months 17 days	5 years 2 months 26 days	5 years 4 months 17 days
Weighted Average Discount Rate - Operating Leases	11.00%	11.00%	11.00%	11.00%