Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)

v3.5.0.2
Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)
$ in Thousands
Sep. 30, 2016
USD ($)
Assets  
Total assets $ 32,727
Warrant [Member]  
Liabilities  
Liabilities 350
Cash [Member]  
Assets  
Total assets 1,328
Money market securities [Member]  
Assets  
Total assets 8,365
Government securities [Member]  
Assets  
Total assets 10,007
Restricted cash [Member]  
Assets  
Total assets 272
Corporate bonds and commercial paper [Member]  
Assets  
Total assets 12,755
Level 1 [Member]  
Assets  
Total assets 19,972
Level 1 [Member] | Cash [Member]  
Assets  
Total assets 1,328
Level 1 [Member] | Money market securities [Member]  
Assets  
Total assets 8,365
Level 1 [Member] | Government securities [Member]  
Assets  
Total assets 10,007
Level 1 [Member] | Restricted cash [Member]  
Assets  
Total assets 272
Level 2 [Member]  
Assets  
Total assets 12,755
Level 2 [Member] | Corporate bonds and commercial paper [Member]  
Assets  
Total assets 12,755
Level 3 [Member] | Warrant [Member]  
Liabilities  
Liabilities $ 350