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