Note 11 - Operating Segments (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Revenue from Contract with Customer, Including Assessed Tax	$ 10,717,000	$ 13,970,000	$ 22,245,000	$ 24,390,000
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Non-US [Member]
Concentration Risk, Percentage			4.00%
Traditional Business [Member]
Revenue from Contract with Customer, Including Assessed Tax	3,711,000	3,459,000	$ 7,285,000	6,988,000
Traditional Business [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,639,000	2,330,000	5,103,000	4,656,000
Traditional Business [Member] | Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,072,000	1,129,000	2,182,000	2,332,000
Journal Technologies [Member]
Revenue from Contract with Customer, Including Assessed Tax	7,006,000	10,511,000	$ 14,960,000	$ 17,402,000
Journal Technologies [Member] | Product Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage			67.00%	71.00%
Journal Technologies [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,467,000	4,848,000	$ 5,943,000	$ 6,717,000
Journal Technologies [Member] | Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 4,539,000	$ 5,663,000	$ 9,017,000	$ 10,685,000