CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jan. 01, 2022	Jan. 02, 2021
Statement of Financial Position [Abstract]
Net of allowances of trade, note and other accounts receivable	$ 0	$ 0
Undesignated preferred stock, par value	$ 0.001	$ 0.001
Undesignated preferred stock, shares authorized	10,000	10,000
Undesignated preferred stock, shares issued	0	0
Undesignated preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	24,636	23,874
Common stock, shares outstanding	24,636	23,874
Treasury stock, shares	5,087	5,087