BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Accounting Policies [Abstract]
Lease incentives	$ 4,000,000		$ 4,000,000
Lease incentives, accumulated amortization	2,800,000		2,700,000
Allowance for uncollectible accounts receivable	416,000		$ 579,000
Tenant recoveries outside of lease agreements	0	$ 0
Remaining performance obligations	$ 0