Note 7 - Concentration of Credit Risk and Major Customers and Suppliers (Details Textual) - Customer Concentration Risk [Member]	3 Months Ended		12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)
Revenue from Contract with Customer Benchmark [Member]
Number of Major Customers	4	4
Revenue from Contract with Customer Benchmark [Member] | Customer 1 [Member]
Concentration Risk, Percentage	10.00%	11.00%
Revenue from Contract with Customer Benchmark [Member] | Customer 2 [Member]
Concentration Risk, Percentage	11.00%	16.00%
Revenue from Contract with Customer Benchmark [Member] | Customer 3 [Member]
Concentration Risk, Percentage	13.00%	17.00%
Revenue from Contract with Customer Benchmark [Member] | Customer 4 [Member]
Concentration Risk, Percentage	14.00%	21.00%
Accounts Receivable [Member]
Number of Customers	2		2	4
Accounts Receivable [Member] | Two Customer [Member]
Concentration Risk, Percentage			68.00%
Accounts Receivable, after Allowance for Credit Loss, Total	$ 610,000		$ 610,000
Accounts Receivable [Member] | Four Customers [Member]
Concentration Risk, Percentage				83.00%
Accounts Receivable, after Allowance for Credit Loss, Total				$ 347,085