Organization	9 Months Ended
Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	1. ORGANIZATION Global Self Storage, Inc. a Maryland corporation (the “Company,” “we,” “our,” or “us”), is a self-administered and self-managed real estate investment trust (“REIT”) that owns, operates, manages, acquires, develops and redevelops self storage properties (“stores” or “properties”) in the United States. The Company stores are located in the Northeast, Mid-Atlantic and Mid-West regions of the United States. The Company was formerly registered under the Investment Company Act of 1940, as amended (the “1940 Act”) as a non-diversified, closed end management investment company. The Securities and Exchange Commission’s (“SEC”) order approving the Company’s application to deregister from the 1940 Act was granted on January 19, 2016. On January 19, 2016, the Company changed its name to Global Self Storage, Inc. from Self Storage Group, Inc., changed its SEC registration from an investment company to an operating company reporting under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and listed its common stock on NASDAQ under the symbol “SELF”. The Company has elected to be treated as a REIT under the Internal Revenue Code of 1986, as amended (the “IRC”). To the extent the Company continues to qualify as a REIT, it will not be subject to tax, with certain limited exceptions, on the taxable income that is distributed to its stockholders. The Company invests in self storage properties by acquiring stores through its wholly owned subsidiaries. At September 30, 2018, the Company owned and operated eleven stores. The Company operates primarily in one segment: rental operations.

1. ORGANIZATION

Global Self Storage, Inc. a Maryland corporation (the “Company,” “we,” “our,” or “us”), is a self-administered and self-managed real estate investment trust (“REIT”) that owns, operates, manages, acquires, develops and redevelops self storage properties (“stores” or “properties”) in the United States. The Company stores are located in the Northeast, Mid-Atlantic and Mid-West regions of the United States. The Company was formerly registered under the Investment Company Act of 1940, as amended (the “1940 Act”) as a non-diversified, closed end management investment company. The Securities and Exchange Commission’s (“SEC”) order approving the Company’s application to deregister from the 1940 Act was granted on January 19, 2016. On January 19, 2016, the Company changed its name to Global Self Storage, Inc. from Self Storage Group, Inc., changed its SEC registration from an investment company to an operating company reporting under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and listed its common stock on NASDAQ under the symbol “SELF”.

The Company has elected to be treated as a REIT under the Internal Revenue Code of 1986, as amended (the “IRC”). To the extent the Company continues to qualify as a REIT, it will not be subject to tax, with certain limited exceptions, on the taxable income that is distributed to its stockholders.

The Company invests in self storage properties by acquiring stores through its wholly owned subsidiaries. At September 30, 2018, the Company owned and operated eleven stores. The Company operates primarily in one segment: rental operations.