Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Real Estate Investment Property, Net [Abstract]
Land	$ 47,681,450us-gaap_Land	$ 41,882,217us-gaap_Land
Buildings and improvements	154,098,293	128,085,648
Tenant improvements	13,164,998us-gaap_TenantImprovements	7,344,151us-gaap_TenantImprovements
Lease Intangibles	9,793,814netr_LeaseIntangibles	5,411,279netr_LeaseIntangibles
Real estate assets and lease intangibles, cost	224,738,555	182,723,295
Accumulated depreciation and amortization	(26,540,852)	(22,492,171)
Real estate assets and lease intangibles, net	198,197,703us-gaap_RealEstateInvestmentPropertyNet	160,231,124us-gaap_RealEstateInvestmentPropertyNet
Cash and cash equivalents	5,636,002	10,207,001	10,746,536
Restricted cash	4,086,498	1,355,277
Deferred leasing and finance costs, net	3,081,223netr_DeferredLeasingAndFinancingCosts	2,649,273netr_DeferredLeasingAndFinancingCosts
Goodwill	2,423,000us-gaap_Goodwill	2,423,000us-gaap_Goodwill
Other assets, net	7,200,512us-gaap_OtherAssets	5,155,669us-gaap_OtherAssets
TOTAL ASSETS	220,624,938us-gaap_Assets	182,021,344us-gaap_Assets
Liabilities:
Mortgage notes payable	123,899,298us-gaap_NotesPayable	89,551,724us-gaap_NotesPayable
Accounts payable and accrued liabilities	6,631,804	4,585,120
Dividends payable	997,175	1,240,455
Below Market Rent	960,328us-gaap_BelowMarketLeaseNet	775,962us-gaap_BelowMarketLeaseNet
Total liabilities	149,088,605us-gaap_Liabilities	96,153,261us-gaap_Liabilities
Shareholders' equity:
Additional paid-in capital	143,715,876	141,494,883
Dividends in excess of accumulated losses	(83,150,866)	(71,226,974)
Total stockholders' equity before noncontrolling interest	60,733,884us-gaap_StockholdersEquity	70,432,662us-gaap_StockholdersEquity	76,704,545us-gaap_StockholdersEquity
Noncontrolling interest	10,802,449us-gaap_MinorityInterest	15,435,421us-gaap_MinorityInterest
Total equity	71,536,333	85,868,083	87,382,668
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	220,624,938	182,021,344
Redeemable Convertible Preferred Stock Series B [Member]
Liabilities:
Series B mandatorily redeemable preferred stock, $.01 par value, $1,000 liquidating preference, shares authorized: 40,000; 16,600 shares and 0 shares issued and outstanding at December 31, 2014 and 2013, respectively.	16,600,000	0
Convertible Series AA Preferred Stock [Member]
Shareholders' equity:
Preferred stock	0	0
Redeemable Convertible Series 6.3% Preferred Stock [Member]
Shareholders' equity:
Preferred stock	0	16
Common Class A [Member]
Shareholders' equity:
Common stock series A, $0.01 par value, shares authorized: 100,000,000; 16,887,377 and 16,473,674 shares issued and outstanding at December 31, 2014 and 2013, respectively	$ 168,874	$ 164,737

The carrying amount (net of accumulated amortization) as of the balance sheet date of (1) costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease and (2) capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

No definition available.