Note 9 - Goodwill and Intangible Assets - Changes in Carrying Amount of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Balance, intangible assets	$ 943
Acquisitions, intangible assets	12,920
Amortization, intangible assets	(1,191)	$ (302)
Currency translation, intangible assets	132
Balance, intangible assets	12,804	943
Hardware [Member]
Balance, intangible assets	29
Acquisitions, intangible assets	0
Amortization, intangible assets	(4)
Currency translation, intangible assets	0
Balance, intangible assets	25	29
Software [Member]
Balance, intangible assets	914
Acquisitions, intangible assets	12,920
Amortization, intangible assets	(1,187)
Currency translation, intangible assets	132
Balance, intangible assets	$ 12,779	$ 914