Note 11 - Share-Based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Jul. 06, 2015	Oct. 03, 2015	Sep. 27, 2014	Oct. 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		19,500
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		49,436
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	40,108
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		497,000			500,000
Restricted Stock [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 1,200
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested		$ 2,400
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				$ 4.84
Stock Issued During Period, Shares, Employee Stock Purchase Plans		73,048
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		$ 18
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Allocated Share-based Compensation Expense		$ 907	$ 551
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 1,200
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		44,500			53,000