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Note 3 - Income Taxes - Provision for Income Taxes (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Federal |  |  |  |  |  |  |  |  | $ (209,000) | $ (2,570,000) | $ (268,000)
State |  |  |  |  |  |  |  |  | (90,000) | (6,000) | (30,000)
|  |  |  |  |  |  |  |  | (299,000) | (2,576,000) | (298,000)
Federal |  |  |  |  |  |  |  |  | (18,577,000) | (3,854,000) | (1,369,000)
State |  |  |  |  |  |  |  |  | (664,000) | (720,000) | (268,000)
|  |  |  |  |  |  |  |  | (19,241,000) | (4,574,000) | (1,637,000)
| $ (1,880,000) | $ (710,000) | $ (100,000) | $ (16,850,000) | $ (1,135,000) | $ (1,465,000) | $ (4,240,000) | $ (310,000) | $ (19,540,000) | $ (7,150,000) | $ (1,935,000)

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