Amortized Cost and Fair Values of Marketable Securities Classified as Available-For-Sale Investments (Detail) - USD ($) $ in Thousands |
Oct. 31, 2015 |
Apr. 30, 2015 |
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Schedule of Available-for-sale Securities [Line Items] | |||||||
Estimated Fair Value | [1] | $ 2,003 | $ 13,177 | ||||
Corporate Bonds | |||||||
Schedule of Available-for-sale Securities [Line Items] | |||||||
Amortized Cost | 2,003 | 13,167 | |||||
Gross Unrealized Gains | 11 | ||||||
Gross Unrealized Losses | [2] | (1) | |||||
Estimated Fair Value | [1] | $ 2,003 | $ 13,177 | ||||
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Details
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