Note 12 - Operating Segments (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Advertising	$ 16,154,000	$ 10,949,000	$ 28,455,000	$ 22,685,000
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Non-US [Member]
Concentration Risk, Percentage			6.00%
Traditional Business [Member]
Advertising	4,090,000	3,943,000	$ 7,877,000	7,725,000
Traditional Business [Member] | Transferred at Point in Time [Member]
Advertising	2,982,000	2,871,000	5,671,000	5,543,000
Traditional Business [Member] | Transferred over Time [Member]
Advertising	1,108,000	1,072,000	2,206,000	2,182,000
Journal Technologies [Member]
Advertising	12,064,000	7,006,000	$ 20,578,000	$ 14,960,000
Journal Technologies [Member] | Product Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage			72.00%	66.00%
Journal Technologies [Member] | Transferred at Point in Time [Member]
Advertising	6,566,000	2,467,000	$ 10,687,000	$ 5,943,000
Journal Technologies [Member] | Transferred over Time [Member]
Advertising	$ 5,498,000	$ 4,539,000	$ 9,891,000	$ 9,017,000