Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Major Customer Concentration (Details Textual)

v3.19.1
Note 7 - Major Customer Concentration (Details Textual) - Customer Concentration Risk [Member]
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Sep. 30, 2018
Revenue Benchmark [Member] | Customer A [Member]          
Concentration Risk, Percentage 17.00% 25.00% 18.00% 24.00%  
Revenue Benchmark [Member] | Customer B [Member]          
Concentration Risk, Percentage 10.00% 16.00%   14.00%  
Revenue Benchmark [Member] | Customer C [Member]          
Concentration Risk, Percentage     11.00%    
Accounts Receivable [Member] | Customer A [Member]          
Concentration Risk, Percentage         10.00%
Accounts Receivable [Member] | Customer B [Member]          
Concentration Risk, Percentage     13.00%   10.00%
Accounts Receivable [Member] | Customer C [Member]          
Concentration Risk, Percentage         35.00%