Federal and State Income Taxes - Additional Information (Detail) - USD ($)	7 Months Ended	12 Months Ended
	Jul. 31, 2014	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2014
Auction Market Preferred Securities, Stock Series [Line Items]
Percentage of taxable income distributed to shareholders		90.00%
Net operating loss carryforwards				$ 9,077,000
Expiration of net operating loss carryforwards		2023
State and local taxes	$ 126,000		$ 247,000
Minimum [Member]
Auction Market Preferred Securities, Stock Series [Line Items]
Percentage of taxable income distributed to shareholders		90.00%