Annual report pursuant to Section 13 and 15(d)

Real Estate and Intangible Assets - Pro-Forma Condensed Consolidated Statements of Operations (Detail)

v2.4.1.9
Real Estate and Intangible Assets - Pro-Forma Condensed Consolidated Statements of Operations (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Operating Data:                      
Total operating revenue                 $ 80,759us-gaap_BusinessAcquisitionsProFormaRevenue $ 80,081us-gaap_BusinessAcquisitionsProFormaRevenue $ 68,940us-gaap_BusinessAcquisitionsProFormaRevenue
Total operating expenses                 (60,728)good_BusinessAcquisitionProFormaOperatingExpenses (46,223)good_BusinessAcquisitionProFormaOperatingExpenses (37,457)good_BusinessAcquisitionProFormaOperatingExpenses
Other expenses                 (24,290)good_BusinessAcquisitionProFormaOtherExpenses (32,929)good_BusinessAcquisitionProFormaOtherExpenses (28,754)good_BusinessAcquisitionProFormaOtherExpenses
Net income (loss)                 (4,259)good_BusinessAcquisitionProFormaNetIncome 929good_BusinessAcquisitionProFormaNetIncome 2,729good_BusinessAcquisitionProFormaNetIncome
Dividends attributable to preferred and senior common stock (1,220)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (1,160)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (1,133)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (1,123)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (1,120)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (1,106)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (1,092)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (1,076)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (4,636)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (4,394)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock (4,206)good_BusinessAcquisitionProFormaDividendsAttributableToPreferredAndSeniorCommonStock
Net loss attributable to common stockholders                 $ (8,895)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss $ (3,465)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss $ (1,477)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Share and Per Share Data:                      
Basic and diluted loss per share of common stock                 $ (0.52)good_BusinessAcquisitionProFormaEarningsPerShareBasicAndDiluted $ (0.26)good_BusinessAcquisitionProFormaEarningsPerShareBasicAndDiluted $ (0.13)good_BusinessAcquisitionProFormaEarningsPerShareBasicAndDiluted
Weighted average shares outstanding-basic and diluted                 17,253,503us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 13,164,244us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 10,953,325us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted