Store Acquisitions - Schedule of Company's Acquisitions of Operating Stores (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2016 USD ($) store	Dec. 31, 2015 store
Business Acquisition [Line Items]
Number of self storage purchased | store	2	0
Aggregate purchase price	$ 13,000,000
Consideration paid, cash	13,000,000
Fair value, closing costs expensed	219,910
In-Place Leases
Business Acquisition [Line Items]
Fair value, in-place tenant leases	260,000
Land
Business Acquisition [Line Items]
Fair value, assets	1,300,000
Building, Equipment and Improvements
Business Acquisition [Line Items]
Fair value, assets	$ 11,440,000
Lima | Ohio
Business Acquisition [Line Items]
Number of self storage purchased | store	1
Date of acquisition	Aug. 29, 2016
Aggregate purchase price	$ 5,300,000
Consideration paid, cash	5,300,000
Fair value, closing costs expensed	107,909
Lima | Ohio | In-Place Leases
Business Acquisition [Line Items]
Fair value, in-place tenant leases	106,000
Lima | Ohio | Land
Business Acquisition [Line Items]
Fair value, assets	530,000
Lima | Ohio | Building, Equipment and Improvements
Business Acquisition [Line Items]
Fair value, assets	$ 4,664,000
Fishers | Indiana
Business Acquisition [Line Items]
Number of self storage purchased | store	1
Date of acquisition	Sep. 26, 2016
Aggregate purchase price	$ 7,700,000
Consideration paid, cash	7,700,000
Fair value, closing costs expensed	112,001
Fishers | Indiana | In-Place Leases
Business Acquisition [Line Items]
Fair value, in-place tenant leases	154,000
Fishers | Indiana | Land
Business Acquisition [Line Items]
Fair value, assets	770,000
Fishers | Indiana | Building, Equipment and Improvements
Business Acquisition [Line Items]
Fair value, assets	$ 6,776,000