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Subsequent Events - Additional Information (Detail) (Subsequent Event, USD $)
In Thousands, unless otherwise specified
1 Months Ended
Apr. 30, 2015
Subsequent Event
 
Subsequent Event [Line Items]  
Amount drawn from revolving line of agreement $ 1,500us-gaap_ProceedsFromLinesOfCredit
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember