CONSOLIDATED STATEMENTS OF OPERATIONS and COMPREHENSIVE INCOME - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues
Rental income	$ 3,099,499	$ 3,070,871	$ 9,162,139	$ 8,967,371
Total revenues	3,225,671	3,200,276	9,546,353	9,343,354
Expenses
Property operations	1,239,432	1,153,947	3,627,372	3,556,232
General and administrative	826,220	762,000	2,391,807	2,457,551
Depreciation and amortization	409,303	409,227	1,223,865	1,225,290
Business development	22,286	2,012	22,286	4,287
Total expenses	2,497,241	2,327,186	7,265,330	7,243,360
Operating income	728,430	873,090	2,281,023	2,099,994
Other income (expense)
Dividend and interest income	75,675	68,703	217,404	211,030
Unrealized gain (loss) on marketable equity securities	(98,704)	499,283	(135,497)	403,935
Interest expense	(209,142)	(259,419)	(647,303)	(675,622)
Total other income (expense), net	(232,171)	308,567	(565,396)	(60,657)
Net income and comprehensive income	$ 496,259	$ 1,181,657	$ 1,715,627	$ 2,039,337
Earnings per share
Basic	$ 0.04	$ 0.11	$ 0.15	$ 0.18
Diluted	$ 0.04	$ 0.1	$ 0.15	$ 0.18
Weighted average shares outstanding
Basic	11,174,369	11,101,705	11,158,957	11,087,613
Diluted	11,232,624	11,159,187	11,218,892	11,127,016
Other property related income
Revenues
Revenues	$ 107,911	$ 111,618	$ 328,789	$ 323,957
Management fees and other income
Revenues
Revenues	$ 18,261	$ 17,787	$ 55,425	$ 52,026

Property operations.

No definition available.

Name:	self_PropertyOperations
Namespace Prefix:	self_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Business development involves the development of products and services, their delivery, design and their implementation. Business development includes a number of techniques designed to grow an economic enterprise. Such techniques include, but are not limited to, assessments of marketing opportunities and target markets, intelligence gathering on customers and competitors, generating leads for possible sales, follow-up sales activity, formal proposal writing and business model design. Business development involves evaluating a business and then realizing its full potential, using such tools as marketing, sales, information management and customer service.