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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Mar. 31, 2016 | Mar. 31, 2015
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Income Tax Disclosure [Abstract] |  |
Net operating loss carryforwards | $ 281,098 | $ 272,498
Research and development and other tax credit carryforwards | 11,878 | 10,655
Accruals and reserves | 28,088 | 37,153
Fixed assets and intangible assets | 2,393 | 2,432
Other | 14,494 | 18,514
Gross deferred tax assets | 337,951 | 341,252
Valuation allowance | (301,393) | (294,860)
Total deferred tax assets | 36,558 | 46,392
Intercompany debt | (27,117) | (36,298)
Other | (9,408) | (10,174)
Total deferred tax liabilities | (36,525) | (46,472)
Net deferred tax asset | $ 33 |
Net deferred tax liability |  | $ (80)

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