Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Fair Value Measurements - Summary of Assets Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member]
$ in Thousands
Sep. 30, 2020
USD ($)
Assets  
Total assets $ 22,443
Cash [Member]  
Assets  
Total assets 1,383
Money market securities (cash equivalents) [Member]  
Assets  
Total assets 21,010
Restricted cash [Member]  
Assets  
Total assets 50
Level 1 [Member]  
Assets  
Total assets 22,443
Level 1 [Member] | Cash [Member]  
Assets  
Total assets 1,383
Level 1 [Member] | Money market securities (cash equivalents) [Member]  
Assets  
Total assets 21,010
Level 1 [Member] | Restricted cash [Member]  
Assets  
Total assets $ 50