Note 12 - Operating Segments (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Revenues	$ 16,571,000	$ 16,154,000	$ 32,564,000	$ 28,455,000
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Non-US [Member]
Concentration Risk, Percentage			14.00%
Traditional Business [Member]
Revenues	4,112,000	4,090,000	$ 7,999,000	7,877,000
Traditional Business [Member] | Transferred at Point in Time [Member]
Revenues	3,013,000	2,982,000	5,805,000	5,671,000
Traditional Business [Member] | Transferred over Time [Member]
Revenues	1,099,000	1,108,000	2,194,000	2,206,000
Journal Technologies [Member]
Revenues	12,459,000	12,064,000	$ 24,565,000	$ 20,578,000
Journal Technologies [Member] | Product Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage			75.00%	75.00%
Journal Technologies [Member] | Transferred at Point in Time [Member]
Revenues	5,814,000	6,566,000	$ 11,384,000	$ 10,687,000
Journal Technologies [Member] | Transferred over Time [Member]
Revenues	$ 6,645,000	$ 5,498,000	$ 13,181,000	$ 9,891,000