Annual report pursuant to Section 13 and 15(d)

Income Taxes (RateRec) (Details)

v3.8.0.1
Income Taxes (RateRec) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Summary of expected tax provision      
Tax provision (benefit), at U.S. federal statutory tax rate $ (573) $ (13,767) $ 3,056
State income tax, net of federal tax provision (1,251) (2,053) 247
Effect of stock-based compensation excess tax benefit (11,522)    
Effects of permanent items 1,145 1,773 1,899
Change in valuation allowance 2,151 26,269 841
Effect of change in federal income tax rate 13,792    
Effect of change in state income tax rate 537 279 283
Uncertain tax positions 3,668 2,024 (859)
Research and development credits (2,815) (2,758) (1,914)
Change in permanent reinvestment assertion (4,494)    
State net operating loss adjustment, net of valuation allowance impact 836    
Other 117 3,310 999
Income tax provision $ 1,591 $ 15,077 $ 4,552