Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jan. 02, 2015	Jan. 03, 2014
Accounts receivable, allowance for contract losses and doubtful accounts	$ 3,386	$ 2,771
Preferred Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized	5,000us-gaap_PreferredStockSharesAuthorized	5,000us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Shares Outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000us-gaap_CommonStockSharesAuthorized	100,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	16,427us-gaap_CommonStockSharesIssued	16,427us-gaap_CommonStockSharesIssued
Treasury stock, shares	3,556us-gaap_TreasuryStockShares	3,363us-gaap_TreasuryStockShares

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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