Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Major Customer Concentration (Details Textual)

v3.19.2
Note 7 - Major Customer Concentration (Details Textual) - Customer Concentration Risk [Member]
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Sep. 30, 2018
Revenue Benchmark [Member] | Customer A [Member]          
Concentration Risk, Percentage 19.00% 20.00% 18.00% 22.00%  
Revenue Benchmark [Member] | Customer B [Member]          
Concentration Risk, Percentage 12.00% 13.00% 10.00% 14.00%  
Revenue Benchmark [Member] | Customer C [Member]          
Concentration Risk, Percentage     11.00%    
Accounts Receivable [Member] | Customer A [Member]          
Concentration Risk, Percentage     17.00%   10.00%
Accounts Receivable [Member] | Customer B [Member]          
Concentration Risk, Percentage     15.00%    
Accounts Receivable [Member] | Customer C [Member]          
Concentration Risk, Percentage         35.00%