DEBT - Borrowing Under Term Loan (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 30, 2018
Debt Instrument [Line Items]
Principal payments on long-term debt	$ 1,837,500	$ 612,500
Texas Capital Bank, National Association (TCB) | Revolving Credit Facility | Credit Agreement
Debt Instrument [Line Items]
Long-Term Debt, Gross, Initial Borrowing	$ 83,500		$ 1,121,000
Debt Instrument, Interest Rate, Effective Percentage for Initial Borrowing Amount	6.50%		6.50%
Long-Term Debt, Gross, Second Borrowing Amount	$ 6,500,000		$ 6,500,000
Debt Instrument, Interest Rate, Effective Percentage for Second Borrowing Amount	5.48%		5.41%
Long-Term Debt, Gross, Third Borrowing Amount	$ 1,700,000		$ 2,500,000
Debt Instrument, Interest Rate, Effective Percentage for Third Borrowing Amount	5.49%		5.41%
Long-term debt, less current portion	$ 8,283,500		$ 10,121,000