Consolidated Statements of Cash Flows - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net (loss) income	$ 1,981	$ (255)	$ (768)	$ (286)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	1,122	1,059	3,343	3,306
Change in fair value of financial instruments	(2,785)		(260)
Noncash rental revenue including straight-line rents	(250)	(157)	(437)	(532)
Stock-based compensation expense	41	19	214	122
Amortization of debt issuance costs	42	34	166	105
Gain on sales of real estate assets			(20)	(584)
Deferred income taxes		(76)		(85)
Changes in assets and liabilities:
Other assets	933	(448)	(254)	(981)
Accounts payable and accrued liabilities	(42)	710	(423)	513
Deferred revenue	(378)	(317)	(652)	(348)
Other liabilities	146	(408)	237	(15)
Net cash provided by operating activities	810	161	1,146	1,215
Investing activities:
Additions to real estate assets	(768)	(1,698)	(1,200)	(3,090)
Acquisitions of land and buildings				(13,670)
Proceeds from sales of real estate assets, net of expenses			496	740
Deferred leasing costs and other	(41)	(68)	(284)	(213)
Changes in short-term investments, net				1,011
Net cash used in investing activities	(809)	(1,766)	(988)	(15,222)
Financing activities:
Proceeds from sale of common stock			108,676	2,500
Dividends paid to stockholders		(2,538)	(3,404)
Principal payments on mortgage loans	(417)	(357)	(1,267)	(4,296)
Payment of debt issuance costs		(162)	(260)	(231)
Net proceeds from revolving lines of credit		(2,875)		11,100
Proceeds from mortgage loans		6,500		15,000
Proceeds from exercise of stock options			6
Net cash provided by (used in) financing activities	(417)	568	103,751	24,073
Net increase (decrease) in cash and cash equivalents	(416)	(1,037)	103,909	10,066
Cash and cash equivalents at beginning of period	28,540	5,874	28,124	4,837
Cash and cash equivalents at end of period	$ 28,124	$ 4,837	$ 132,033	$ 14,903