Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 26, 2022	Dec. 26, 2021
Accounts receivable, allowance for doubtful accounts	$ 3,311	$ 4,016
Trade and other notes receivable, allowance for doubtful accounts, current	129	129
Notes receivable, allowance for doubtful accounts, noncurrent	$ 271	$ 271
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, authorized (in shares)	15,000,000	15,000,000
Preferred stock, issued (in shares)	3,221,471	3,221,471
Preferred stock, outstanding (in shares)	3,221,471	3,221,471
Preferred stock, liquidation preference (in dollars per share)	$ 25	$ 25
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	51,600,000	51,600,000
Common stock, issued (in shares)	16,402,402	16,380,552
Common stock, outstanding (in shares)	16,402,402	16,380,552
Class A Shares
Common stock, authorized (in shares)	50,000,000
Common stock, issued (in shares)	15,131,597	15,109,747
Common stock, outstanding (in shares)	15,131,597	15,109,747
Class B Shares
Common stock, authorized (in shares)	1,600,000
Common stock, issued (in shares)	1,270,805	1,270,805
Common stock, outstanding (in shares)	1,270,805	1,270,805