Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 14,850	$ 14,040	$ 9,158
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and depletion	8,320	8,544	7,792
Amortization of discounts/premiums on debt	321	353	227
Amortization of net origination fees related to notes receivable	(1)	(5)	(16)
Stock based compensation, net of forfeitures	1,428	1,649	1,392
(Gain) loss on disposition of assets	(7,841)	(2,882)	200
Bad debt expense	542	876	300
Changes in operating assets and liabilities:
Increase in accounts receivable	1,260	(422)	(1,105)
Decrease (increase) in interest receivable	(806)	(484)	(331)
Increase in other assets	(103)	(1,029)	(892)
(Increase) decrease in inventory	(1,264)	(216)	257
Increase in accrued interest payable	(1,242)	1,103	1,655
(Increase) decrease in accrued expenses	2,417	2,139	(15,307)
(Decrease) in deferred revenue	(114)	(3,881)	(2,164)
(Increase) decrease in accrued property taxes	227	218	(237)
Net cash provided by operating activities	17,994	20,003	929
CASH FLOWS FROM INVESTING ACTIVITIES
Real estate acquisitions	(1,403)	(33,154)	(206,166)
Real estate improvements	(6,583)	(12,785)	(21,576)
Principal receipts on notes receivable	6,679	4,852
Issuance of notes receivable	(1,781)	(6,662)	(6,570)
Casualty loss insurance recovery		(8)	205
Proceeds from sale of property	34,140	31,893
Net cash used in investing activities	31,052	(15,864)	(234,107)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings from mortgage notes payable		21,000	212,190
Repayments on mortgage notes payable	(11,385)	(11,508)	(81,219)
Proceeds from underwritten public offering		(157)
Common stock repurchased	(22,003)	(20,598)	(10,000)
Participating preferred stock repurchased	(896)	(465)
Payment of offering costs			(573)
Payment of debt issuance costs		(204)	(1,293)
Proceeds from issuance of Series B participating preferred shares			144,523
Dividends on common stock	(6,177)	(14,433)	(14,688)
Dividends on Series A preferred units	(3,510)	(3,510)	(2,915)
Dividends on Series B participating preferred stock	(8,975)	(9,053)	(3,346)
Distributions to non-controlling interest in operating partnership	(430)	(1,856)	(3,131)
Net cash provided by (used in) financing activities	(53,376)	(40,784)	239,548
NET (DECREASE) INCREASE IN CASH	(4,330)	(36,645)	6,370
CASH, BEGINNING OF PERIOD	16,891	53,536	47,166
CASH, END OF PERIOD	12,561	16,891	53,536
Cash paid during period for interest	20,593	17,037	11,827
SUPPLEMENTAL NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Deferred offering costs amortized through equity in the period	218		420
Additions to real estate improvements included in accrued expenses		350	1,375
Issuance of equity and contributions from redeemable non-controlling interests and non-controlling interest in operating partnership in conjunction with acquisitions			181,509
Right of use asset/lease liability	197
Other assets acquired in business combination			1,759
Accounts receivable acquired in acquisitions			896
Property tax liability assumed in acquisitions		(15)	596
Deferred financing costs included in accrued expenses			16
Offering costs included in accrued expenses			13
Settlement of outstanding notes receivable		802
Settlement of outstanding notes receivable with property acquisitions	1,895
Common stock
SUPPLEMENTAL NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Dividends payable, common stock	1,498	1,530	4,243
Preferred Share
SUPPLEMENTAL NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Preferred distributions accrued	2,240
Common Unit Holders
SUPPLEMENTAL NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Distributions payable, common units	95	229	604
Preferred Unit
SUPPLEMENTAL NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Preferred distributions accrued	$ 3,510	$ 3,510	$ 3,510