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Other Assets (Detail) - USD ($) | Sep. 30, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Other Assets [Line Items] |  |  |
Raw land | $ 46,105,130 | $ 47,190,225 | $ 49,965,418
Other intangibles, net | 394,958 | 455,632 | 536,533
Total other assets | 5,612,568 | 5,745,982 | 5,895,991
Other Assets [Member] |  |  |
Other Assets [Line Items] |  |  |
Deferred rent receivable | 3,055,566 | 2,950,034 | 2,097,623
Raw land | 900,000 | 900,000 | 900,000
Prepaid expenses, deposits and other | 639,932 | 564,983 | 758,173
Accounts receivable, net | 305,738 | 558,959 | 683,446
Notes receivable | $ 316,374 | $ 316,374 | $ 920,216

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