NOTES PAYABLE AND LONG-TERM DEBT - Narrative (Details) - USD ($)	Apr. 20, 2020	Aug. 21, 2019	Jun. 29, 2018	Jun. 30, 2020
Term loan
Line of Credit Facility [Line Items]
Term at time of borrowing			5 years
Interest rate				2.79%
Credit Agreement
Line of Credit Facility [Line Items]
Extension of maturity date			2 years
Maximum borrowing capacity			$ 14,000,000.0
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			$ 3,000,000.0
Basis spread of variable rate			0.00%
Unused capacity, commitment fee percentage			0.25%
Remaining borrowing capacity				$ 13,000,000.0
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 | Working Capital
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 6,000,000.0
Remaining borrowing capacity	$ 6,000,000.0			5,900,000
Credit Agreement | Acquisitions
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 8,000,000.0
Percentage of portion allocated to acquisition purchase price			75.00%
Remaining borrowing capacity	8,000,000.0			7,100,000
Credit Agreement | Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 2,000,000.0
Amount outstanding				100,000
Loan Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 3,200,000
Term at time of borrowing		5 years
Interest rate		2.79%
Interest rate at expiration of advance period		4.15%
Remaining borrowing capacity				1,200,000
Loan Agreement | LIBOR
Line of Credit Facility [Line Items]
Basis spread of variable rate		2.50%
Paycheck Protection Program loan
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 2,200,000
Paycheck Protection Program loan | Term Loan
Line of Credit Facility [Line Items]
Term at time of borrowing	2 years
Debt instrument, interest rate, stated percentage	1.00%
Real estate loan
Line of Credit Facility [Line Items]
Remaining borrowing capacity				900,000
Equipment loan
Line of Credit Facility [Line Items]
Remaining borrowing capacity				$ 300,000
Improvements | Loan Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 2,000,000.0
Amortization period by which monthly payment is determined		20 years
Equipment | Loan Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 1,200,000
Amortization period by which monthly payment is determined		6 years