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RELATED PARTY TRANSACTIONS - Other (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Chairman | General and administrative expense
Related Party Transactions
Quarterly fees paid	$ 74,500	$ 74,500
Vice Chairman
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	$ 246,000

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