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Reconciliation Between Effective Tax Rate and U.S. Statutory Rate (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Income before taxes on income $ 7,381 $ 2,033 $ 7,473
Theoretical tax at U.S. statutory rate 2,510 691 2,541
Foreign income taxes at rates other than U.S. rate (958) (489) (1,057)
Approved and benefited enterprises benefits (1,653) (785) (1,553)
Subpart F 434 394 633
Non-deductible items 349 723 433
Non-taxable items (481) (230)  
Decrease in uncertain tax position   (920) (73)
Changes in valuation allowance 839 3,356 (111)
Other, net 74 112 (25)
Taxes on income $ 1,114 $ 2,852 $ 788