Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v2.4.1.9
Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Accounting Policies [Abstract]    
Restricted cash equivalent $ 200,000us-gaap_RestrictedCashAndCashEquivalents $ 0us-gaap_RestrictedCashAndCashEquivalents