Note 12 - Operating Segments (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from Contract with Customer, Including Assessed Tax	$ 12,552,000	$ 13,562,000	$ 34,797,000	$ 37,952,000
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Non-US [Member]
Concentration Risk, Percentage			5.00%
Traditional Business [Member]
Revenue from Contract with Customer, Including Assessed Tax	3,873,000	4,083,000	$ 11,158,000	11,071,000
Traditional Business [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,776,000	2,957,000	7,879,000	7,613,000
Traditional Business [Member] | Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,097,000	1,126,000	3,279,000	3,458,000
Journal Technologies [Member]
Revenue from Contract with Customer, Including Assessed Tax	8,679,000	9,479,000	$ 23,639,000	$ 26,881,000
Journal Technologies [Member] | Product Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage			68.00%	71.00%
Journal Technologies [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	4,046,000	4,312,000	$ 9,989,000	$ 11,029,000
Journal Technologies [Member] | Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 4,633,000	$ 5,167,000	$ 13,650,000	$ 15,852,000