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DEBT (Details Textual)		3 Months Ended		6 Months Ended
	Jul. 16, 2019 USD ($) request	Jun. 27, 2021 USD ($)	Jun. 28, 2020 USD ($)	Jun. 27, 2021 USD ($)	Jun. 28, 2020 USD ($)	Dec. 27, 2020 USD ($)	Feb. 03, 2020 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding, amount		$ 100,000		$ 100,000
Long-term line of credit		11,906,814		11,906,814		$ 5,709,266
Line of credit facility, average outstanding amount		8,900,000	$ 13,000,000.0	7,600,000	$ 16,100,000
Derivative, notional amount		25,000,000.0		25,000,000.0
Credit Agreement | BMO Harris Bank, N.A. | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 35,000,000
Credit Agreement | Texas Capital Bank, National Association (TCB) | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term line of credit		$ 12,137,484		$ 12,137,484		$ 5,977,342
Term Loan | Credit Agreement | BMO Harris Bank, N.A.
Debt Instrument [Line Items]
Long term debt	$ 30,000,000
Number of requests to increase term loan | request	2
Line of credit facility, maximum increase	$ 40,000,000
Line of credit facility, minimum increase	$ 10,000,000
Senior Notes | Term Loan | BMO Harris Bank, N.A.
Debt Instrument [Line Items]
Long term debt							$ 3,800,000

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Nominal or face amount used to calculate payment on derivative.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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