CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowances for receivables	$ 2,761	$ 2,733
Debt discount, current	0	201
Debt discount, non-current	$ 3,792	$ 2,544
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	9,100,923	9,031,263
Common stock, shares outstanding	9,100,923	9,031,263