Note 10 - Shareholders' Equity (Details) - Summary Of Stock Options Activity By Range Of Exercise Prices	12 Months Ended
	Jan. 03, 2016 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding (in Shares) | shares	87,500
Options Outstanding, Weighted Average Remaining Contractual Life	3 years 328 days
Options Outstanding, Weighted Average Exercise Price	$ 8.75
Options Exercisable (in Shares) | shares	87,500
Options Exercisable, Weighted Average Exercise Price	$ 8.75
Exercise Price Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	4.01
Range of Exercise Prices, Upper Range Limit	$ 5.00
Options Outstanding (in Shares) | shares	40,000
Options Outstanding, Weighted Average Remaining Contractual Life	3 years
Options Outstanding, Weighted Average Exercise Price	$ 4.31
Options Exercisable (in Shares) | shares	40,000
Options Exercisable, Weighted Average Exercise Price	$ 4.31
Exercise Price Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	12.00
Range of Exercise Prices, Upper Range Limit	$ 14.00
Options Outstanding (in Shares) | shares	47,500
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 255 days
Options Outstanding, Weighted Average Exercise Price	$ 12.49
Options Exercisable (in Shares) | shares	47,500
Options Exercisable, Weighted Average Exercise Price	$ 12.49