Quarterly report pursuant to Section 13 or 15(d)

Agreement with OBI Pharma - Additional Information (Detail)

v3.7.0.1
Agreement with OBI Pharma - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 16, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]          
Revenue   $ 3,000 $ 0 $ 3,000 $ 0
OBI Pharma          
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]          
Nonrefundable payments received for sale of TH-3424 rights and obligations $ 3,000        
Revenue $ 3,000