Condensed Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jul. 01, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts and sales promotions	$ 490	$ 495
Preferred stock par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000	100,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	5,153,706	5,153,706
Common stock, shares outstanding	5,153,706	5,153,706