Annual report pursuant to Section 13 and 15(d)

Related-Party Transactions - Additional Information (Detail)

v2.4.1.9
Related-Party Transactions - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Related Party Transactions [Abstract]    
Advisory fee paid to related party $ 60,000us-gaap_SponsorFees $ 45,000us-gaap_SponsorFees