DEBT - Borrowing Under Term Loan (Details) - USD ($)		6 Months Ended
	May 25, 2018	Jul. 01, 2018	Jun. 25, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Principal payments on long-term debt	$ 10,704,000	$ 12,847,750	$ 0
Texas Capital Bank, National Association (TCB) | Revolving Credit Facility | Credit Agreement
Debt Instrument [Line Items]
Long-Term Debt, Gross, Initial Borrowing		$ 0		$ 687,500
Debt Instrument, Interest Rate, Effective Percentage for Initial Borrowing Amount		6.00%		5.50%
Long-Term Debt, Gross, Second Borrowing Amount		$ 6,500,000		$ 6,500,000
Debt Instrument, Interest Rate, Effective Percentage for Second Borrowing Amount		5.00%		4.34%
Long-Term Debt, Gross, Third Borrowing Amount		$ 4,539,750		$ 6,500,000
Debt Instrument, Interest Rate, Effective Percentage for Third Borrowing Amount		5.08%		4.38%
Long-Term Debt, Gross, Fourth Borrowing Amount		$ 0		$ 6,000,000
Debt Instrument, Interest Rate, Effective Percentage for Fourth Borrowing Amount		0.00%		4.49%
Long-Term Debt, Gross, Fifth Borrowing Amount		$ 0		$ 4,200,000
Debt Instrument, Interest Rate, Effective Percentage for Fifth Borrowing Amount		0.00%		4.64%
Long-term debt, less current portion		$ 11,039,750		$ 23,887,500