Annual report pursuant to Section 13 and 15(d)

Income Taxes - Deferred tax assets and liabilities (Details)

v3.10.0.1
Income Taxes - Deferred tax assets and liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets:    
Federal and state net operating loss carryforwards $ 51,346 $ 37,411
Tax credit carryforwards 10,558 7,573
Intangible assets 51 56
Stock-based compensation 2,108 1,059
Leasehold incentive 155 240
Other 2,809 1,237
Total deferred tax assets 67,027 47,576
Less valuation allowance $ (67,027) $ (47,576)