Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Series B Preferred Share [Member]	Series C Preferred Share [Member]	Series D Preferred Share [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2019	$ 4,113	$ 95,030	$ 243,750	$ 66,268	$ 162,542	$ (25,364)	$ 546,339
Beginning balance, shares at Dec. 31, 2019	41,130,000
Common Stock Issued with the DRIP*	$ 13	0	0	0	1,588	0	1,601
Common Stock Issued with the DRIP*, shares	133,000
Common Stock Issued through Restricted Stock Awards	$ 3	0	0	0	(3)	0	0
Common Stock Issued through Restricted Stock Awards, shares	26,000
Common Stock Issued through Stock Options	$ 3	0	0	0	303	0	306
Common Stock Issued through Stock Options, shares	29,000
Preferred Stock Issued in connection with At-The-Market Offerings, net	$ 0	0	0	63,999	(867)	0	63,132
Distributions	0	0	0	0	(50,255)	34,748	(15,507)
Stock Compensation Expense	0	0	0	0	574	0	574
Net Income (Loss)	0	0	0	0	0	(34,748)	(34,748)
Repurchase of Preferred Stock	$ 0	(13)	0	0	1	0	(12)
Repurchase of Preferred Stock, shares	0
Repurchase of Common Stock	$ (15)	0	0	0	(1,589)	0	(1,604)
Repurchase of Common Stock, shares	(152,000)
Ending balance, value at Mar. 31, 2020	$ 4,117	95,017	243,750	130,267	112,294	(25,364)	560,081
Ending balance, shares at Mar. 31, 2020	41,166,000
Beginning balance, value at Dec. 31, 2020	$ 4,192	0	247,100	160,854	115,026	(25,364)	501,808
Beginning balance, shares at Dec. 31, 2020	41,920,000
Common Stock Issued with the DRIP*	$ 24	0	0	0	3,838	0	3,862
Common Stock Issued with the DRIP*, shares	239,000
Common Stock Issued through Restricted Stock Awards	$ 30	0	0	0	(30)	0	0
Common Stock Issued through Restricted Stock Awards, shares	297,000
Common Stock Issued through Stock Options	$ 21	0	0	0	2,567	0	2,588
Common Stock Issued through Stock Options, shares	215,000
Common Stock Issued in connection with At-The-Market Offerings, net	$ 35	0	0	0	6,550	0	6,585
Common Stock Issued in connection with At-The-Market, shares	352,000
Preferred Stock Issued in connection with At-The-Market Offerings, net	$ 0	0	0	31,591	(727)	0	30,864
Distributions	0	0	0	0	(1,209)	(13,878)	(15,087)
Stock Compensation Expense	0	0	0	0	750	0	750
Net Income (Loss)	0	0	0	0	0	13,878	13,878
Ending balance, value at Mar. 31, 2021	$ 4,302	$ 0	$ 247,100	$ 192,445	$ 126,765	$ (25,364)	$ 545,248
Ending balance, shares at Mar. 31, 2021	43,023,000