NOTES PAYABLE AND LONG-TERM DEBT - Narrative (Details) - USD ($)				12 Months Ended
	Jan. 22, 2021	Aug. 21, 2019	Jun. 29, 2018	Jun. 30, 2021	Dec. 28, 2020	Apr. 20, 2020
Term Loan
Line of Credit Facility [Line Items]
Term at time of borrowing			5 years
Interest rate				3.00%
Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 14,000,000
Percentage of eligible accounts receivable considered for borrowing base			80.00%
Percentage of eligible inventory considered for borrowing base			50.00%
Amount of covenant for borrowing base			$ 3,000,000
Basis spread of variable rate			50.00%
Unused capacity, commitment fee percentage			0.25%
Remaining borrowing capacity				$ 13,900,000
Maximum borrowing capacity, option				17,900,000
Credit Agreement | Working Capital
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 6,000,000
Remaining borrowing capacity				5,900,000
Credit Agreement | Acquisitions
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 8,000,000
Percentage of portion allocated to acquisition purchase price			75.00%
Remaining borrowing capacity				$ 8,000,000
Credit Agreement | Additional Working Capital
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 4,000,000
Credit Agreement | Maximum
Line of Credit Facility [Line Items]
Debt cash flow leverage ratio				3.0
Credit Agreement | Minimum
Line of Credit Facility [Line Items]
Debt service coverage ratio				1.15
Credit Agreement | LIBOR
Line of Credit Facility [Line Items]
Basis spread of variable rate			2.50%
Credit Agreement | LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread of variable rate			3.00%
Credit Agreement | Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 2,000,000
Amount outstanding				$ 100,000
Credit Agreement Amendment
Line of Credit Facility [Line Items]
Maximum borrowing capacity					$ 18,000,000
Loan Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 3,200,000
Term at time of borrowing		5 years
Basis spread of variable rate				2.50%
Interest rate				2.73%
Loan Agreement | Real Estate Improvements
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 2,000,000
Loan Agreement | Equipment Loan
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 1,200,000
Loan Agreement | LIBOR
Line of Credit Facility [Line Items]
Interest rate at expiration of advance period				4.15%
Real estate loan
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 900,000
Term at time of borrowing	5 years
Debt payment, amortization period	20 years
Debt instrument, interest rate, stated percentage	4.00%
Paycheck Protection Program loan
Line of Credit Facility [Line Items]
Debt instrument, face amount						$ 2,200,000