Note 11 - Share-Based Compensation (Details Textual) - USD ($)		6 Months Ended
	Jan. 05, 2015	Jul. 04, 2015	Jun. 28, 2014	Jul. 02, 2015	Jan. 03, 2015
The 2007 Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		296,667
The 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		700,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		24,500
The 2000 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		1,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		25,000
The 2014 Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		425,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		200,000
The 2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		625,000
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		89,544
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date		85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate		10.00%
Stock Issued During Period, Shares, Employee Stock Purchase Plans	32,940
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 1,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		497,000			500,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested		$ 2,800,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		1 year
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Common Stock [Member]
Share Price				$ 5.69
Stock Issued During Period, Shares, Employee Stock Purchase Plans		32,940
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		0	15,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Allocated Share-based Compensation Expense		$ 611,000	$ 368,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 1,500,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		49,500			53,000