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RELATED PARTY TRANSACTIONS - Other (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Chairman | General and administrative expense
Related Party Transactions
Quarterly fees paid			$ 74,500	$ 74,500
Vice Chairman | General and administrative expense
Related Party Transactions
Quarterly fees paid			29,800	29,800
Gould Investors L.P. | Real estate expenses
Related Party Transactions
Amount of insurance reimbursed	$ 1,402,000		1,402,000
Insurance expense recognized of amounts reimbursed to related party	$ 366,000	$ 307,000	$ 928,000	$ 797,000

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- Definition

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