Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Current assets:
Allowance for doubtful accounts	$ 1,067	$ 898
Shareholders’ deficit:
Undesignated preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Undesignated preferred stock, shares issued (in shares)	0	0
Undesignated preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	142,500,000	142,500,000
Common stock, shares issued (in shares)	27,636,000	27,961,000
Common stock, shares outstanding (in shares)	27,636,000	27,961,000