Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	May 29, 2020	Aug. 30, 2019
Statement Of Financial Position [Abstract]
Accounts receivable, net of allowances	$ 217	$ 184
Ordinary shares, par value	$ 0.03	$ 0.03
Ordinary shares, authorized	200,000,000	200,000,000
Ordinary shares, issued	24,144,000	23,617,000
Ordinary shares, outstanding	24,144,000	23,617,000