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Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2016 | Apr. 30, 2015 | Apr. 30, 2014
Current tax expense: |  |  |
Federal | $ 974 | $ 759 | $ 907
State and local | 117 | 151 | 168
Foreign | 1,122 | 1,348 | 917
Total current tax expense | 2,213 | 2,258 | 1,992
Deferred tax expense (benefit): |  |  |
Federal | (431) | (187) | 27
State and local | 98 | (70) | 26
Foreign | (18) | (256) | (62)
Total deferred tax benefit | (351) | (513) | (9)
Net income tax expense | $ 1,862 | $ 1,745 | $ 1,983

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