SUMMARY OF PAYMENT OF DIVIDENDS TO PREFERRED SHAREHOLDERS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Preferred stock, dividend declared per share, paid	$ 0.64	$ 0.77	$ 0.63
Series B Preferred Stocks [Member]
Amount of distributions paid for preferred stock		$ 6,735,811	$ 7,602,400
Preferred stock, dividend declared per share, paid		$ 1.7722	$ 2.00
Series B Preferred Stocks [Member] | Dividend Payment Date One [Member]
Declaration Date		Jan. 15, 2020	Jan. 15, 2019
Record Date		Feb. 18, 2020	Feb. 15, 2019
Payment Date		Mar. 16, 2020	Mar. 15, 2019
Amount of distributions paid for preferred stock		$ 1,900,600	$ 1,900,600
Preferred stock, dividend declared per share, paid		$ 0.50	$ 0.50
Series B Preferred Stocks [Member] | Dividend Payment Date Two [Member]
Declaration Date		Apr. 02, 2020	Apr. 01, 2019
Record Date		May 15, 2020	May 15, 2019
Payment Date		Jun. 15, 2020	Jun. 17, 2019
Amount of distributions paid for preferred stock		$ 1,900,335	$ 1,900,600
Preferred stock, dividend declared per share, paid		$ 0.50	$ 0.50
Series B Preferred Stocks [Member] | Dividend Payment Date Three [Member]
Declaration Date		Jul. 01, 2020	Jul. 01, 2019
Record Date		Aug. 17, 2020	Aug. 15, 2019
Payment Date		Sep. 15, 2020	Sep. 16, 2019
Amount of distributions paid for preferred stock		$ 1,900,335	$ 1,900,600
Preferred stock, dividend declared per share, paid		$ 0.50	$ 0.50
Series B Preferred Stocks [Member] | Dividend Payment Date Four [Member]
Declaration Date		Sep. 11, 2020	Oct. 01, 2019
Record Date		Sep. 11, 2020	Nov. 15, 2019
Payment Date		Oct. 20, 2020	Dec. 16, 2019
Amount of distributions paid for preferred stock		$ 1,034,541	$ 1,900,600
Preferred stock, dividend declared per share, paid		$ 0.2722	$ 0.50
Series C Preferred Stock [Member]
Amount of distributions paid for preferred stock	$ 16,679,252	$ 16,523,705	$ 14,765,624
Preferred stock, dividend declared per share, paid	$ 1.68750	$ 1.68750	$ 1.68750
Series C Preferred Stock [Member] | Dividend Payment Date One [Member]
Declaration Date	Jan. 15, 2021	Jan. 15, 2020	Jan. 15, 2019
Record Date	Feb. 16, 2021	Feb. 18, 2020	Feb. 15, 2019
Payment Date	Mar. 15, 2021	Mar. 16, 2020	Mar. 15, 2019
Amount of distributions paid for preferred stock	$ 4,169,813	$ 4,113,281	$ 2,425,781
Preferred stock, dividend declared per share, paid	$ 0.421875	$ 0.421875	$ 0.421875
Series C Preferred Stock [Member] | Dividend Payment Date Two [Member]
Declaration Date	Apr. 01, 2021	Apr. 02, 2020	Apr. 01, 2019
Record Date	May 17, 2021	May 15, 2020	May 15, 2019
Payment Date	Jun. 15, 2021	Jun. 15, 2020	Jun. 17, 2019
Amount of distributions paid for preferred stock	$ 4,169,813	$ 4,113,281	$ 4,113,281
Preferred stock, dividend declared per share, paid	$ 0.421875	$ 0.421875	$ 0.421875
Series C Preferred Stock [Member] | Dividend Payment Date Three [Member]
Declaration Date	Jul. 01, 2021	Jul. 01, 2020	Jul. 01, 2019
Record Date	Aug. 15, 2021	Aug. 17, 2020	Aug. 15, 2019
Payment Date	Sep. 15, 2021	Sep. 15, 2020	Sep. 16, 2019
Amount of distributions paid for preferred stock	$ 4,169,813	$ 4,127,330	$ 4,113,281
Preferred stock, dividend declared per share, paid	$ 0.421875	$ 0.421875	$ 0.421875
Series C Preferred Stock [Member] | Dividend Payment Date Four [Member]
Declaration Date	Oct. 01, 2021	Oct. 01, 2020	Oct. 01, 2019
Record Date	Nov. 15, 2021	Nov. 16, 2020	Nov. 15, 2019
Payment Date	Dec. 15, 2021	Dec. 15, 2020	Dec. 16, 2019
Amount of distributions paid for preferred stock	$ 4,169,813	$ 4,169,813	$ 4,113,281
Preferred stock, dividend declared per share, paid	$ 0.421875	$ 0.421875	$ 0.421875
Series D Preferred Stock [Member]
Amount of distributions paid for preferred stock	$ 13,159,456	$ 8,683,371	$ 3,341,388
Preferred stock, dividend declared per share, paid	$ 1.59375	$ 1.59375	$ 1.59375
Series D Preferred Stock [Member] | Dividend Payment Date One [Member]
Declaration Date	Jan. 15, 2021	Jan. 15, 2020	Jan. 15, 2019
Record Date	Feb. 16, 2021	Feb. 18, 2020	Feb. 15, 2019
Payment Date	Mar. 15, 2021	Mar. 16, 2020	Mar. 15, 2019
Amount of distributions paid for preferred stock	$ 2,869,321	$ 2,076,126	$ 796,876
Preferred stock, dividend declared per share, paid	$ 0.3984375	$ 0.3984375	$ 0.3984375
Series D Preferred Stock [Member] | Dividend Payment Date Two [Member]
Declaration Date	Apr. 01, 2021	Apr. 02, 2020	Apr. 01, 2019
Record Date	May 17, 2021	May 15, 2020	May 15, 2019
Payment Date	Jun. 15, 2021	Jun. 15, 2020	Jun. 17, 2019
Amount of distributions paid for preferred stock	$ 3,430,045	$ 2,076,126	$ 796,876
Preferred stock, dividend declared per share, paid	$ 0.3984375	$ 0.3984375	$ 0.3984375
Series D Preferred Stock [Member] | Dividend Payment Date Three [Member]
Declaration Date	Jul. 01, 2021	Jul. 01, 2020	Jul. 01, 2019
Record Date	Aug. 15, 2021	Aug. 17, 2020	Aug. 15, 2019
Payment Date	Sep. 15, 2021	Sep. 15, 2020	Sep. 16, 2019
Amount of distributions paid for preferred stock	$ 3,430,045	$ 2,081,704	$ 796,876
Preferred stock, dividend declared per share, paid	$ 0.3984375	$ 0.3984375	$ 0.3984375
Series D Preferred Stock [Member] | Dividend Payment Date Four [Member]
Declaration Date	Oct. 01, 2021	Oct. 01, 2020	Oct. 01, 2019
Record Date	Nov. 15, 2021	Nov. 16, 2020	Nov. 15, 2019
Payment Date	Dec. 15, 2021	Dec. 15, 2020	Dec. 16, 2019
Amount of distributions paid for preferred stock	$ 3,430,045	$ 2,449,415	$ 950,760
Preferred stock, dividend declared per share, paid	$ 0.3984375	$ 0.3984375	$ 0.3984375