Annual report pursuant to Section 13 and 15(d)

Income Tax - Reconciliation of Income Tax Attributable to Operations (Detail)

v3.19.1
Income Tax - Reconciliation of Income Tax Attributable to Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Income taxes at statutory rates (at a rate of 21% for 2018 and 34% for 2017 and 2016) $ (2,664) $ (4,636) $ (504)
Expenses not deducted for tax purposes 70 (174)  
Effect of tax rate changes on deferred tax assets and liabilities (1,416) 3,158  
Rate differential on foreign earnings (165) 314  
Change in valuation allowance 4,182 (1,683)  
Book to tax return adjustments 20    
Other $ (27) (14)  
Income tax expense   $ (3,035) $ (504)