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RELATED PARTY TRANSACTIONS - Other (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 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
Insurance expense recognized of amounts reimbursed to related party	$ 281,000	$ 245,000	$ 562,000	$ 490,000

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