SHORT-TERM AND LONG-TERM DEBT - Summary of short-term and long-term debt (Parentheticals) (Details)	3 Months Ended
	Dec. 31, 2018 USD ($)
Line of credit payable to bank due by February 27, 2019
Debt Instrument [Line Items]
Interest rate	4.99%
Notes payable to finance companies, final payments due January 2019 through June 2019
Debt Instrument [Line Items]
Note payable in monthly installments	$ 62,355
Notes payable to finance companies, final payments due January 2019 through June 2019 | Minimum
Debt Instrument [Line Items]
Interest rate	0.00%
Notes payable to finance companies, final payments due January 2019 through June 2019 | Maximum
Debt Instrument [Line Items]
Interest rate	7.62%
Note payable to finance company for insurance premiums financed due November 2018 in monthly installments
Debt Instrument [Line Items]
Note payable in monthly installments	$ 288,581
Interest rate	2.77%
Notes payable to bank, final payment due November 2034
Debt Instrument [Line Items]
Note payable in monthly installments	$ 7,799
Interest rate	4.82%
Notes payable to bank, final payment due November 2025
Debt Instrument [Line Items]
Note payable in monthly installments	$ 11,828
Interest rate	5.00%
Notes payable to bank, at interest rate of 6.5%, final payment due February 2019
Debt Instrument [Line Items]
Note payable in monthly installments	$ 172,473
Interest rate	6.50%
Notes payable to bank, at interest rate of 5.0%, final payment due February 2019
Debt Instrument [Line Items]
Note payable in monthly installments	$ 30,914
Interest rate	5.00%
Notes payable to bank, final payment due September 2022
Debt Instrument [Line Items]
Note payable in monthly installments	$ 98,865
Interest rate	4.99%
Notes payable to bank, final payment due September 2021
Debt Instrument [Line Items]
Note payable in monthly installments	$ 46,482
Interest rate	5.00%