XML 99 R85.htm IDEA: XBRL DOCUMENT v3.22.0.1
Income Taxes - Reconciliation of Provision for Income Taxes at Statutory Federal Income Tax Rate (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Tax expense at the statutory federal income tax rate $ 3.5 $ 9.6 $ 5.3
State income tax, net of federal income tax 1.4 0.3 (2.3)
Research and development tax credits (4.1) (4.3) (6.7)
FIN 48 impact 1.8 4.0 3.2
Liquidation of subsidiary (0.8) 0.0 (0.9)
Change in foreign subsidiary net operating loss carryforward 4.4 (0.3) (1.4)
Valuation allowance impact (8.1) (1.0) 5.8
Changes in tax rates 0.7 0.3 0.1
Effects of Cares Act - 2018 NOL carryback 0.0 (9.5) 0.0
Share-based compensation 0.4 0.3 1.2
Other items (0.6) (0.6) (1.3)
Total income tax (benefit) provision $ (1.4) $ (1.2) $ 3.0