Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Oct. 02, 2015	Jan. 02, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts and contract losses	$ (3,340)	$ (3,386)
Total accounts receivable, net	94,168	86,368
Unbilled accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	35,786	26,423
Billed accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 61,722	$ 63,331