Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Jan. 01, 2016	Jan. 02, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for contract losses and doubtful accounts	$ (2,792)	$ (3,386)
Total accounts receivable, net	88,577	86,368
Unbilled accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	29,009	26,423
Billed accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 62,360	$ 63,331