XML 176 R80.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes - Components of the Company's Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets:    
Net operating loss carryforwards $ 118,897 $ 87,521
Research and investment credits 11,154 9,402
Accruals and reserves 7,734 6,627
Depreciation 1,119 911
Stock-based compensation 5,404 4,146
Interest expense 2,466  
Total deferred tax assets 146,774 108,607
Deferred tax liabilities:    
Intangible assets (1,002) (1,273)
Convertible debt (4,675) (5,664)
Capitalized costs (8,002) (4,648)
Total deferred tax liabilities (13,679) (11,585)
Valuation allowance (132,759) (96,630)
Net deferred tax assets $ 336 $ 392