Quarterly report pursuant to Section 13 or 15(d)

Leases - Schedule of Adjustments Made to Accounts on Condensed Consolidated Balance Sheet (Detail)

v3.19.3
Leases - Schedule of Adjustments Made to Accounts on Condensed Consolidated Balance Sheet (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Lessee Lease Description [Line Items]        
Operating lease right-of-use assets, non-current $ 10,397 $ 7,200 $ 4,180 $ 0
Total assets 93,162   4,180 140,158
Operating lease liabilities, current 963   976  
Operating lease liabilities, non-current 10,573   3,729 0
Total liabilities $ 40,146   4,705 39,252
Previously Reported        
Lessee Lease Description [Line Items]        
Operating lease right-of-use assets, non-current       0
Total assets       0
Operating lease liabilities, current       0
Operating lease liabilities, non-current       0
Total liabilities       525
Effect of Adoption of ASC 842        
Lessee Lease Description [Line Items]        
Operating lease right-of-use assets, non-current     4,180  
Total assets     4,180  
Operating lease liabilities, current     976  
Operating lease liabilities, non-current     3,729  
Total liabilities     4,180  
Other Noncurrent Liabilities        
Lessee Lease Description [Line Items]        
Deferred rent     0  
Other Noncurrent Liabilities | Previously Reported        
Lessee Lease Description [Line Items]        
Deferred rent       $ 525
Other Noncurrent Liabilities | Effect of Adoption of ASC 842        
Lessee Lease Description [Line Items]        
Deferred rent     $ (525)