Note 16 - Stockholders' Equity - Summary of Changes in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Balance	$ 65,958	$ 49,140
Share-based compensation expense	$ 558	$ 182
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)	15,000	25,899
Issuance of common stock upon exercise of stock options, net	$ 46	$ 54
Stock buyback	(441)
Release of obligation to issue commons stock	0
Other comprehensive income (loss)	(85)	469
Net income (loss)	(1,305)	(619)
Obligation to issue common stock		3,431
Accumulated other comprehensive income	(85)	469
Balance	$ 64,731	$ 52,657
Common Stock [Member]
Balance (in shares)	36,403,833	33,561,544
Balance	$ 364	$ 336
Share-based compensation expense	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)	15,000	25,899
Issuance of common stock upon exercise of stock options, net	$ 0	$ 0
Stock buyback (in shares)	(116,868)
Stock buyback	$ (1)
Release of obligation to issue commons stock (in shares)	69,564
Release of obligation to issue commons stock	$ 0
Other comprehensive income (loss)	0	0
Net income (loss)	0	0
Obligation to issue common stock		0
Accumulated other comprehensive income	$ 0	$ 0
Balance (in shares)	36,371,529	33,587,443
Balance	$ 363	$ 336
Additional Paid-in Capital [Member]
Balance	107,110	91,248
Share-based compensation expense	558	182
Issuance of common stock upon exercise of stock options, net	46	54
Stock buyback	(441)
Release of obligation to issue commons stock	0
Other comprehensive income (loss)	0	0
Net income (loss)	0	0
Obligation to issue common stock		3,431
Accumulated other comprehensive income	0	0
Balance	107,273	94,915
Retained Earnings [Member]
Balance	(41,154)	(41,858)
Share-based compensation expense	0	0
Issuance of common stock upon exercise of stock options, net	0	0
Stock buyback	0
Release of obligation to issue commons stock	0
Other comprehensive income (loss)	0	0
Net income (loss)	(1,305)	(619)
Obligation to issue common stock		0
Accumulated other comprehensive income	0	0
Balance	(42,459)	(42,477)
AOCI Attributable to Parent [Member]
Balance	2	(250)
Share-based compensation expense	0	0
Issuance of common stock upon exercise of stock options, net	0	0
Stock buyback	0
Release of obligation to issue commons stock	0
Other comprehensive income (loss)	(85)	469
Net income (loss)	0	0
Obligation to issue common stock		0
Accumulated other comprehensive income	(85)	469
Balance	$ (83)	$ 219