Note 5 - Revenue Recognition - Contract Asset and Contract Liabilities (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2021 USD ($)
Balance	$ 4,707
New performance obligations	17,410
Recognition of revenue as a result of satisfying performance obligations	(11,996)
Effect of exchange rate on deferred revenue	8
Balance	10,129
Less: non-current portion	(308)
Current portion	9,821
Customer Deposits [Member]
Balance	3,683
New performance obligations	15,511
Recognition of revenue as a result of satisfying performance obligations	(10,493)
Effect of exchange rate on deferred revenue	0
Balance	8,701
Less: non-current portion	0
Current portion	8,701
Deferred Revenue [Member]
Balance	1,024
New performance obligations	1,899
Recognition of revenue as a result of satisfying performance obligations	(1,503)
Effect of exchange rate on deferred revenue	8
Balance	1,428
Less: non-current portion	(308)
Current portion	$ 1,120