XML 52 R58.htm IDEA: XBRL DOCUMENT v3.20.1
Income Taxes - Schedule of Temporary Differences Between Basis of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets:      
Net operating loss carryforwards $ 46,362 $ 33,275  
Tax credit carryforwards 4,262 4,365  
Accrued expenses 37 103  
Deferred rent   2,209  
Lease liabilities 6,776    
Equity compensation 1,481 784  
Amortizable intangibles 1,214 1,339  
Other 138 78  
Gross deferred tax assets 60,270 42,153  
Deferred tax liabilities:      
Property and equipment (1,720) (1,863)  
Right of use assets (4,716)    
Gross deferred tax liabilities (6,436) (1,863)  
Valuation allowance $ (53,834) $ (40,290) $ (26,515)