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Fair Value Measurement - Summary of Fair Value Hierarchy of Financial Assets and Liabilities Measured (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Jun. 30, 2014
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total assets $ 222us-gaap_CashAndCashEquivalentsFairValueDisclosure $ 1,622us-gaap_CashAndCashEquivalentsFairValueDisclosure
Level 1    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total assets 222us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
1,622us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Money Market Funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total assets 222us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_MoneyMarketFundsMember
1,622us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_MoneyMarketFundsMember
Money Market Funds | Level 1    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total assets $ 222us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_MoneyMarketFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
$ 1,622us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_MoneyMarketFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member