Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Major Customer Concentration (Details Textual)

v3.21.1
Note 7 - Major Customer Concentration (Details Textual) - Customer Concentration Risk [Member]
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Sep. 30, 2020
Revenue Benchmark [Member] | Customer A [Member]          
Concentration Risk, Percentage 21.00% 21.00% 20.00% 20.00%  
Revenue Benchmark [Member] | Customer B [Member]          
Concentration Risk, Percentage 11.00%   11.00% 11.00%  
Revenue Benchmark [Member] | Customer C [Member]          
Concentration Risk, Percentage       10.00%  
Accounts Receivable [Member] | Customer A [Member]          
Concentration Risk, Percentage     10.00%   12.00%
Accounts Receivable [Member] | Customer B [Member]          
Concentration Risk, Percentage     14.00%   13.00%