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Note 6 - Reportable Segments (Details Textual) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($)
Revenue from Contract with Customer, Including Assessed Tax | $ 10,106,000 | $ 11,007,000 | $ 9,338,000 | $ 10,252,000 | $ 10,914,000 | $ 10,201,000 | $ 10,279,000 | $ 9,990,000 | $ 40,703,000 | $ 41,384,000 | $ 41,612,000
Number of Reportable Segments |  |  |  |  |  |  |  |  | 2 |  |
Traditional Business [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | $ 17,172,000 | 17,570,000 | 18,417,000
Traditional Business [Member] | Transferred at Point in Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 11,771,000 | 11,916,000 | 12,505,000
Traditional Business [Member] | Transferred over Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 5,401,000 | 5,654,000 | 5,912,000
Journal Technologies [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 23,531,000 | 23,814,000 | 23,195,000
Journal Technologies [Member] | Transferred at Point in Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 7,437,000 | 8,618,000 | 9,735,000
Journal Technologies [Member] | Transferred over Time [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | $ 16,094,000 | $ 15,196,000 | $ 13,460,000

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