Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Information - Summary of Quarterly Results of Operations (Detail)

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Quarterly Financial Information - Summary of Quarterly Results of Operations (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]                      
Operating revenues $ 29,386 $ 28,667 $ 28,197 $ 28,137 $ 27,261 $ 26,591 $ 26,593 $ 26,353 $ 114,387 $ 106,798 $ 94,799
Operating expenses (22,462) (19,445) (19,058) (19,266) (18,771) (17,422) (17,542) (17,402) (80,231) (71,137) (68,337)
Other expense, net (6,452) (7,031) (6,934) (4,198) (5,973) (6,492) (6,526) (4,346) (24,615) (23,337) (20,525)
Net income attributable to the Company 472 2,191 2,205 4,673 2,517 2,677 2,525 4,605 9,628 12,320 5,937
Net loss (income) attributable to OP Units held by Non-controlling OP Unitholders 100 16 16 (45) (4) 0 0 0 87 (4) 0
Dividends attributable to preferred and senior common stock (1) (5,877) (2,838) (2,837) (2,836) (2,844) (2,847) (2,842) (2,814)      
Net (loss) income (attributable) available to common stockholders $ (5,305) $ (631) $ (616) $ 1,792 $ (331) $ (170) $ (317) $ 1,791 $ (4,760) $ 973 $ (4,939)
Net (loss) income (attributable) available to common stockholders - basic & diluted (in shares) $ (0.18) $ (0.02) $ (0.02) $ 0.06 $ (0.01) $ (0.01) $ (0.01) $ 0.06 $ (0.16) $ 0.03 $ (0.19)
Other Comprehensive income (loss) $ 356 $ (624) $ (988) $ (722) $ (1,212) $ 245 $ 289 $ 495 $ (1,978) $ (183) $ 35
Series A and B Preferred Stock offering costs write off                 $ (2,674) $ 0 $ 0