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Income Taxes - Schedule of temporary differences comprising the net deferred income tax liability (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Oct. 01, 2017
--- | --- | ---
Deferred Tax Assets: |  |
State taxes | $ 1,220 | $ 598
Reserves and contingent liabilities | 2,646 | 2,941
Allowance for doubtful accounts | 4,259 | 4,273
Accrued liabilities | 19,611 | 22,466
Stock-based compensation | 6,338 | 10,069
Loss carry-forwards | 23,492 | 28,261
Valuation allowance | (21,479) | (25,326)
Total deferred tax assets | 36,087 | 43,282
Deferred Tax Liabilities: |  |
Unbilled revenue | (25,819) | (46,408)
Prepaid expense | (3,524) | (6,253)
Intangibles | (23,319) | (24,328)
Property and equipment | (4,984) | (8,311)
Total deferred tax liability | (57,646) | (85,300)
Net deferred tax liabilities | $ (21,559) | $ (42,018)

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