Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Major Customer Concentration (Details Textual)

v3.21.2
Note 7 - Major Customer Concentration (Details Textual) - Customer Concentration Risk [Member]
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Sep. 30, 2020
Revenue Benchmark [Member] | Customer A [Member]          
Concentration Risk, Percentage 18.00% 20.00% 20.00% 20.00%  
Revenue Benchmark [Member] | Customer B [Member]          
Concentration Risk, Percentage 12.00% 11.00% 11.00% 11.00%  
Accounts Receivable [Member] | Customer A [Member]          
Concentration Risk, Percentage     13.00%   13.00%
Accounts Receivable [Member] | Customer B [Member]          
Concentration Risk, Percentage     14.00%   12.00%
Accounts Receivable [Member] | Customer C [Member]          
Concentration Risk, Percentage     11.00%   0.00%