Note 2 - Significant Accounting Policies (Details Textual)		3 Months Ended			9 Months Ended
		Sep. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($) shares	Sep. 30, 2021 USD ($) shares	Sep. 30, 2020 USD ($) shares	Dec. 31, 2020 USD ($)
Amortization of above and below Market Leases		$ 6,000		$ 26,000	$ 4,000	$ 84,000
Amortization of Intangible Assets, Total		68,000		116,000	275,000	369,000
Deferred Costs, Total		1,300,000			1,300,000		$ 1,900,000
Operating Lease, Initial Direct Cost Expense, over Term		85,000		106,000	257,000	306,000
Cash Equivalents, at Carrying Value, Total		27,800,000			27,800,000		11,500,000
Restricted Cash, Total		$ 3,800,000			$ 3,800,000		4,200,000
Number of Real Estate Properties Held for Sale		1			1
Unamortized Deferred Stock Costs		$ 2,000			$ 2,000		109,000
Real Estate Investment Property and Lease Intangibles, Net		125,888,000			125,888,000		166,254,000
Impairment of Real Estate		$ 0		$ 0	$ 300,000	$ 845,674
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares		401,167		212,517	401,167	212,517
Series D Preferred Stock [Member]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs					$ 2,500,000
Class A Common Stock and Related Warrants [Member]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs					$ 1,100,000
Model Home [Member]
Number of Real Estate Properties Held for Sale		3			3
Highland Court [Member]
Real Estate Investment Property and Lease Intangibles, Net	[1],[2]	$ 0			$ 0		10,500,000
Impairment of Real Estate			$ 300,000
Highland Court [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Disposal Group, Including Discontinued Operation, Consideration							$ 10,200,000
Maximum [Member]
Amortization of Value In Place Leases (Year)					10 years
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)					5 years
Minimum [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)					1 year

[1] A portion of the proceeds from the sale of Highland Court were used in like-kind exchange transactions pursued under Section 1031 of the Internal Revenue for the acquisition of our Mandolin property. Mandolin is owned by NetREIT Palm Self-Storage LP, through its wholly owned subsidiary NetREIT Highland LLC, and the Company is the sole general partner and owns 61.3% of NetREIT Palm Self-Storage LP.

[2] This property was sold during the nine months ended September 30, 2021.