Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.19.1
Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
3 Months Ended
Jan. 01, 2019
USD ($)
Mar. 31, 2019
USD ($)
Facility
Product Information [Line Items]    
Warrants exercise or expiration period   Sep. 30, 2018
Cash and cash equivalents, maturity description   90 days or less
Number of leased facilities | Facility   1
Lessee, operating lease, description   The Company also elected a policy of not recording leases on its condensed consolidated balance sheets when the leases have a term of 12 months or less and the Company is not reasonably certain to elect an option to purchase the leased asset
ROU assets   $ 177
Lease liabilities   $ 2,410
ASU 2018-11 [Member]    
Product Information [Line Items]    
ROU assets $ 200  
Lease liabilities 2,500  
Derecognition of the deferred rent $ 2,300  
Maximum [Member]    
Product Information [Line Items]    
Short-term contractual maturities   1 year
Minimum [Member]    
Product Information [Line Items]    
Long-term contractual maturities   1 year