Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Jan. 03, 2021	Dec. 29, 2019
Allowance for doubtful accounts	$ 0	$ 0
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000	10,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000	200,000
Common stock, shares issued (in shares)	11,094	8,331
Common stock, shares outstanding (in shares)	11,094	8,331