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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Jun. 26, 2021	Dec. 26, 2020
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 250,000	$ 175,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,000	3,000
Preferred stock, shares issued	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	150,000,000	150,000,000
Common Stock, Shares, Issued	91,557,666	91,059,407
Common Stock, Shares, Outstanding	88,946,489	85,443,378
Treasury stock, shares	67,460	2,564,155

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Amount of allowance for credit loss on accounts receivable, classified as current.

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