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 |
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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% |
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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