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Income Taxes - Schedule of Reconciliation of Income Tax Provision and Statutory Rate (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Tax expense (benefit) at statutory rate $ 524 $ 494 $ (11,525)
Increase (decrease) in tax resulting from:      
State income tax, net of federal benefit 1,337 367 174
Domestic production activities deduction   (235) (561)
Intangible asset and goodwill impairment   1,789 17,859
Change in uncertain tax position reserves 73 465 (624)
Permanent differences related to divestitures 7,048    
Permanent differences 693 1,026 (31)
Impact of rate differences and adjustments 57 (20) (1,655)
United States and foreign tax incentives (1,443) (240) (1,035)
Earnout (income) expense (69) (1,779) 2,573
Change in valuation allowance 1,521 1,044 222
Revaluation of deferred tax assets and liabilities   (4,819)  
Net deemed distribution on repatriation of foreign earnings (1,713) 6,426  
Foreign withholding taxes on repatriation of foreign earnings 666    
Other 924 (80) (107)
Income tax provision from continuing operations $ 9,618 $ 4,438 $ 5,290