LINE OF CREDIT AND LONG-TERM DEBT - Credit Agreement Amendments (Details) - Line of Credit - USD ($)			1 Months Ended	9 Months Ended
	Jul. 26, 2019	Feb. 01, 2017	Aug. 31, 2019	Sep. 30, 2019
EBC Credit Agreement
Line of Credit Facility [Line Items]
Line of credit, debt covenant, event of default under any agreement, debt amount minimum	$ 750,000	$ 500,000		$ 500,000
Line of credit, debt covenant, maximum annual capital expenditures allowed		$ 3,000,000		3,000,000.0
Line of credit, debt covenant, minimum average borrowing availability in any 30 day period				$ 2,000,000.0
MG Purchase Agreement
Line of Credit Facility [Line Items]
Maximum payment to lenders	1,100,000
Heartland Purchase Agreement
Line of Credit Facility [Line Items]
Maximum payment to lenders	9,000,000
Tier One | EBC Credit Agreement
Line of Credit Facility [Line Items]
Line of credit, debt covenant, maximum annual capital expenditures allowed	3,500,000.0
Line of credit, debt covenant, minimum average borrowing availability in any 30 day period			$ 1,500,000.0
Tier Two | EBC Credit Agreement
Line of Credit Facility [Line Items]
Line of credit, debt covenant, maximum annual capital expenditures allowed	3,000,000
Line of credit, debt covenant, minimum average borrowing availability in any 30 day period	$ 2,000,000