Note 15 - Subsequent Events (Details Textual) - USD ($)				3 Months Ended		9 Months Ended
	Apr. 01, 2020	Mar. 12, 2020	Jan. 13, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jan. 03, 2020
Revenue from Contract with Customer, Including Assessed Tax				$ 8,329,043	$ 10,128,436	$ 30,297,835	$ 36,508,220
Subsequent Event [Member]
Proceeds from Paycheck Protection Program Under CARES Act	$ 1,000,000
Forecast [Member] | Conversion of Accounts Receivable Owed to Investor to Preferred Stock [Member]
Debt Conversion, Original Debt, Amount	$ 482,000
Forecast [Member] | Series A Preferred Stock [Member] | Conversion of Accounts Receivable Owed to Investor to Preferred Stock [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)	48,200
Forecast [Member] | Purchase Agreement [Member] | Series A Preferred Stock [Member]
Sale of Stock, Shares Agreed to Purchase (in shares)								500,000
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)								10
Shares Issued, Price Per Share (in dollars per share)								$ 10
Sale of Stock, Offering Amount								$ 5,000,000
Proceeds from Issuance or Sale of Equity, Total		$ 4,926,600
Stock Issued During Period, Shares, New Issues (in shares)		492,660
Forecast [Member] | Additional Offering [Member] | Series A Preferred Stock [Member]
Shares Issued, Price Per Share (in dollars per share)								$ 10
Sale of Stock, Contingent Additional Offered Shares (in shares)								200,000
Forecast [Member] | First Closing of the Offering [Member] | Series A Preferred Stock [Member]
Proceeds from Issuance or Sale of Equity, Total			$ 2,500,000
Ziploc [Member]
Revenue from Contract with Customer, Including Assessed Tax				$ 2,000,000		$ 6,300,000