Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Income Tax - Reconciliation of Income Tax Attributable to Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Income taxes at statutory rates (at a rate of 34% for all years presented) $ (4,636) $ (504) $ (407)
Expenses not deducted for tax purposes (174)    
Effect of tax rate changes on deferred tax assets and liabilities 3,158    
Rate differential on foreign earnings 314    
Change in valuation allowance (1,683)    
Other (14)    
Income tax expense $ (3,035) $ (504) $ (407)