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Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2016 | Sep. 30, 2015
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforward | $ 16,122 | $ 17,650
Foreign tax credit carryforward | 14,590 | 0
Research credit carryforward | 6,132 | 5,759
Accrued bonus | 13,807 | 5,400
Investments | 619 | 1,042
Accrued compensation | 1,328 | 1,834
Share-based compensation | 27,203 | 23,741
Deferred revenue | 1,467 | 979
Accrued lease costs | 3,406 | 5,009
Property and equipment | 3,348 | 3,249
Other | 7,728 | 5,613
Deferred tax assets, gross | 95,750 | 70,276
Less valuation allowance | (15,145) | (13,882)
Total deferred tax assets | 80,605 | 56,394
Deferred tax liabilities: |  |
Intangible assets | (28,056) | (30,286)
Prepaid expense | (3,959) | (3,877)
Other | (992) | (993)
Total deferred tax liabilities | (33,007) | (35,156)
Deferred tax assets, net | $ 47,598 | $ 21,238

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