Note 8 - Goodwill and Patents (Details Textual) $ in Thousands |
3 Months Ended | |
|---|---|---|
|
Dec. 31, 2017
USD ($)
|
Sep. 30, 2017
USD ($)
|
|
| Goodwill, Impairment Loss | $ 0 | $ 0 |
| Number of Patents Granted | 12 | |
| Patents [Member] | ||
| Finite-Lived Intangible Asset, Useful Life | 20 years | |
| X | ||||||||||
- Definition Represents the number of patents granted in the United States. No definition available.
|
| X | ||||||||||
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|