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Note 2 - Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) | Sep. 30, 2018 | Sep. 30, 2017
--- | --- | ---
Gross intangible | $ 24,475,000 | $ 24,475,000
Accumulated amortization | (24,475,000) | (21,417,000)
|  | 3,058,000
Customer Relationships [Member] |  |
Gross intangible | 21,950,000 | 21,950,000
Accumulated amortization | (21,950,000) | (19,174,000)
| 0 | 2,776,000
Developed Technology Rights [Member] |  |
Gross intangible | 2,525,000 | 2,525,000
Accumulated amortization | (2,525,000) | (2,243,000)
| $ 0 | $ 282,000

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