Stockholders' Equity - Additional Information (Detail) - USD ($)					1 Months Ended				5 Months Ended	12 Months Ended
	Sep. 15, 2014	Apr. 11, 2014	Oct. 01, 2012	Jun. 24, 2010	Dec. 31, 2016	Aug. 31, 2016	Dec. 31, 2015	Feb. 28, 2015	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Proceeds from initial public offering		$ 208,300,000
Maximum offering costs as percentage of gross offering proceeds					15.00%				15.00%	15.00%
Stock issuance and other offering costs										$ 0	$ 0	$ 9,500,000
Special cash distributions declared, per share (in usd per share)			$ 0.006666667	$ 0.000219178			$ 1.70	$ 1.30		$ 3	$ 3
Annualized rate of share (in usd per share)			$ 0.08	$ 0.08
Common stock distributions declared (in shares)												1,187,388
Special cash distributions, declared and paid											$ 67,578,518
Percentage of cash distributions paid to stockholders that were considered taxable income											6.10%
Percentage of cash distributions paid to stockholders that were considered capital gain											47.40%
Percentage of cash distributions paid to stockholders that were considered a return of capital											46.50%
Unrecaptured gain percentage											6.40%
Distributions to stockholders as return of capital											$ 0
Redemption of common stock (in shares)	51,000											40,447
Summary of Liquidation [Line Items]
Average redemption price per share (in usd per share)												$ 9.90
Redemption of common stock, value of share												$ 400,185
Liquidation Basis
Summary of Liquidation [Line Items]
Liquidating distributions to stockholders (in usd per share)					$ 2.30	$ 2.35			$ 4.65
Payments for liquidating distributions										$ 104,700,000