Note 7 - Major Customer Concentration (Details Textual) - Customer Concentration Risk [Member] |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2018 |
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| Sales Revenue, Net [Member] | |||
| Number of Major Customers | 2 | 2 | |
| Accounts Receivable [Member] | |||
| Number of Major Customers | 2 | 3 | |
| X | ||||||||||
- Definition Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc. No definition available.
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- Details
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