INVESTMENT IN UNCONSOLIDATED AFFILIATES - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Banner Building | First Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	$ 6,814	$ 6,951
Grand Forks Market Place Retail Center | First Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	9,040	9,520
SE Savage, LLC | First Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	30,517	30,726
SE Savage, LLC | Second Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	654	1,397
SE Maple Grove, LLC | First Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	24,788	24,788
SE Maple Grove, LLC | Second Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	3,643	3,643
SE Rogers
Investment in Unconsolidated Affiliates
Assets of unconsolidated investee	32,427	32,864
SE Rogers | First Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	25,742	25,742
SE Rogers | Second Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	3,390	2,938
ST Oak Cliff, LLC
Investment in Unconsolidated Affiliates
Assets of unconsolidated investee	47,228	40,404
Mortgage balance	32,010	23,409
ST Oak Cliff, LLC | First Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	24,592	24,448
SE Brooklyn Park, LLC
Investment in Unconsolidated Affiliates
Assets of unconsolidated investee	30,761	30,490
SE Brooklyn Park, LLC | Second Mortgage
Investment in Unconsolidated Affiliates
Mortgage balance	2,310	0
SE Fossil Creek, LLC
Investment in Unconsolidated Affiliates
Assets of unconsolidated investee	29,218	11,083
Mortgage balance	$ 12,274	0
Operating Partnership | Banner Building
Investment in Unconsolidated Affiliates
Ownership interest (as a percent)	66.67%
Operating Partnership | Grand Forks Market Place Retail Center
Investment in Unconsolidated Affiliates
Ownership interest (as a percent)	50.00%
Percentage of interest	100.00%
Operating Partnership | SE Savage, LLC
Investment in Unconsolidated Affiliates
Ownership interest (as a percent)	60.00%
Operating Partnership | SE Maple Grove, LLC
Investment in Unconsolidated Affiliates
Ownership interest (as a percent)	60.00%
Operating Partnership | SE Rogers
Investment in Unconsolidated Affiliates
Ownership interest (as a percent)	60.00%
Operating Partnership | ST Oak Cliff, LLC
Investment in Unconsolidated Affiliates
Ownership interest (as a percent)	70.00%
Operating Partnership | SE Brooklyn Park, LLC
Investment in Unconsolidated Affiliates
Ownership interest (as a percent)	60.00%
Operating Partnership | Sterling Properties LLLP
Investment in Unconsolidated Affiliates
Cash contribution	$ 9,300	9,300
Operating Partnership | SE Fossil Creek, LLC
Investment in Unconsolidated Affiliates
Ownership interest (as a percent)	70.00%
Cash contribution	$ 9,275	$ 7,190