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Note 17 - Net Loss Per Share - Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Mar. 31, 2022
Net loss	$ (3,403)	$ (3,507)	$ (492)	$ (1,305)	$ (6,910)	$ (1,797)
Basic and diluted income per share (in dollars per share)	$ (0.09)		$ (0.01)		$ (0.19)	$ (0.05)
Weighted average shares outstanding - basic (in shares)	36,817,026		36,535,321		36,755,920	36,405,321
Assumed exercise of dilutive options (in shares)	0		0		0	0
Weighted average shares outstanding - diluted (in shares)	36,817,026		36,535,321		36,755,920	36,405,321
Options (in shares)	4,649,599		3,499,439		4,649,599	3,499,439
Share-Based Payment Arrangement, Option [Member]
Options (in shares)	4,187,022		2,977,384		4,187,022	2,977,384
Restricted Stock Units (RSUs) [Member]
Options (in shares)	393,013		382,927		393,013	382,927
Obligation to Issue Common Stock [Member]
Options (in shares)	69,564		139,128		69,564	139,128

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