LINE OF CREDIT AND LONG-TERM DEBT - Long-Term Debt (Details)	Jul. 01, 2021 USD ($)	Aug. 07, 2020 USD ($)	Sep. 30, 2021	May 26, 2021 USD ($)	Apr. 01, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jan. 01, 2021 USD ($)	Nov. 27, 2020 USD ($)	Nov. 26, 2020 USD ($)	Dec. 31, 2019 USD ($)
Deposit Note | Seller
Debt Instrument
Promissory note				$ 10,000,000
EBC Credit Agreement | Capex Loan
Debt Instrument
Line of credit, maximum borrowing capacity		$ 2,000,000
Minimum advance request		500,000
Advance request multiples		100,000
Debt instrument interest rate effective percentage			0.08%
Daily availability requirements		$ 1,000,000
Line of credit capital expenditure limitation							$ 3,000,000	$ 4,000,000	$ 3,000,000	$ 3,000,000
Line of credit, minimum required availability							$ 2,000,000	$ 1,000,000		$ 2,000,000
EBC Credit Agreement | Capex Loan | LIBOR
Debt Instrument
Interest rate (percentage)		7.00%
EBC Credit Agreement | Capex Loan | Prime Rate
Debt Instrument
Interest rate (percentage)		0.50%
EBC Credit Agreement | Capex Loan | Federal fund rate
Debt Instrument
Interest rate (percentage)		6.00%
EBC Credit Agreement | Deposit Note
Debt Instrument
Promissory note	$ 10,000,000
EBC Credit Agreement | Term Loan
Debt Instrument
Line of credit, maximum borrowing capacity	$ 5,000,000
Required monthly installment payments	0.0208
EBC Credit Agreement | Term Loan | LIBOR
Debt Instrument
Debt instrument interest rate effective percentage			0.08%
Interest rate (percentage)	6.50%
EBC Credit Agreement | Term Loan | Prime Rate
Debt Instrument
Interest rate (percentage)	0.50%
EBC Credit Agreement | Term Loan | Federal fund rate
Debt Instrument
Interest rate (percentage)	6.00%
ABL Credit Agreement
Debt Instrument
Line of credit, minimum required availability					$ 2,000,000	$ 1,000,000