Related Party Transactions - Additional Information (Detail) - SP Corporate - Management Services Agreement - USD ($)		3 Months Ended	9 Months Ended
	Dec. 24, 2014	Jul. 31, 2015	Apr. 30, 2016
Related Party Transaction [Line Items]
Fixed monthly fee to be paid in consideration of services	$ 175,000
Management services agreement, effective date of agreement			Jan. 01, 2015
Management services agreement, amended expiration date of agreement			Dec. 31, 2015
Management services agreement, renew period		1 year