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Note 8 - Equity Plans (Detail) - Restricted Stock Unit Activity (Restricted Stock Units (RSUs) [Member], USD $)	0 Months Ended		3 Months Ended
	Jan. 02, 2013	Jan. 03, 2012	Mar. 31, 2013	Dec. 31, 2012
Restricted Stock Units (RSUs) [Member]
Outstanding, Number of Shares (in Shares)			230,160	192,819
Outstanding, Weighted Average Exercise Price			$ 25.43	$ 26.22
Outstanding, Aggregate Intrinsic value			$ 163	$ 0
Vested at March 31, 2013 (in Shares)			164,271
Vested at March 31, 2013			$ 26.16
Vested at March 31, 2013			$ 135
Granted (in Shares)	1,800	1,800	37,341
Granted			$ 21.33

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Number of shares reserved for issuance under non-option equity instrument agreements awarded that validly exist and are outstanding, including vested instruments.

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