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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation for Continuing Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]        
Statutory U.S. federal income tax rate   $ (5,680) $ 4,806 $ 12,737
State taxes, net of U.S. federal benefit   1,043 1,038 1,598
Foreign rate differential, including withholding taxes   131 784 (3,849)
Valuation allowances, net   (165) 4,116 3,548
Research credits   (829) (710) (397)
Italian subsidiary intangible asset     (230) (381)
Domestic manufacturing deduction       (818)
Unrecognized tax benefits, net of settlements   (2,745) 81 6,002
Impact of the Tax Act $ (600)   (560) 8,347
Equity compensation   626 (1,646) 272
Executive compensation   1,504 606 123
Contingent consideration   5,678 528  
Other, net   1,850 261 1,918
Income tax expense   $ 1,413 $ 9,074 $ 29,100
Statutory U.S. federal income tax rate   21.00% 21.00% 35.00%
State taxes, net of U.S. federal benefit   (3.90%) 4.50% 4.40%
Foreign rate differential, including withholding taxes   (0.50%) 3.40% (10.60%)
Valuation allowances, net   0.60% 18.00% 9.70%
Research credits   3.10% (3.10%) (1.10%)
Italian subsidiary intangible asset     (1.00%) (1.00%)
Domestic manufacturing deduction       (2.20%)
Unrecognized tax benefits, net of settlements   10.10% 0.40% 16.50%
Impact of the Tax Act     (2.40%) 22.90%
Equity compensation   (2.30%) (7.20%) 0.70%
Executive compensation   (5.60%) 2.60% 0.30%
Contingent consideration   (21.00%) 2.30%  
Other, net   (6.70%) 1.20% 5.40%
Income tax expense/effective rate   (5.20%) 39.70% 80.00%