Annual report pursuant to Section 13 and 15(d)

Summary of Income Tax Current and Deferred Provision (Detail)

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Summary of Income Tax Current and Deferred Provision (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current:      
State $ 14 $ 19 $ 22
Foreign 90 93 69
Total current income tax provision 104 112 91
Deferred:      
Federal (41) (694) 60
Total deferred income tax provision (41) (694) 60
Total income tax provision $ 63 $ (582) $ 151