Annual report pursuant to Section 13 and 15(d)

Income Taxes - Deferred tax assets and liabilities (Details)

v3.8.0.1
Income Taxes - Deferred tax assets and liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Deferred tax assets:    
Federal and state net operating loss carryforwards $ 37,411 $ 33,846
Tax credit carryforwards 7,573 3,350
Intangible assets 56 197
Stock-based compensation 1,059 247
Leasehold incentive 240 467
Other 1,237 1,605
Total deferred tax assets 47,576 39,712
Less valuation allowance $ (47,576) (39,624)
Net deferred tax assets   88
Deferred tax liabilities:    
Fixed assets   (88)
Total deferred tax liabilities   $ (88)