Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)

v3.10.0.1
Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Federal tax expense, at statutory rate 21.00% 35.00% 35.00%
State income tax expense, net of federal benefit 3.60% 2.80% 2.80%
Change in valuation allowance 1.00% (0.10%) 0.00%
Tax credits (6.80%) (1.70%) (6.10%)
Stock-based compensation (3.10%) (2.90%) (0.60%)
Federal tax reform - deferred rate change 0.00% 14.60% 0.00%
Other, net 1.50% 1.00% 0.60%
Effective tax rate 17.20% 48.70% 31.70%