Note 6 - Fair Value Measurements - Holdback Liability Measured at Fair Value on a Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member] - Assets Acquisition of Amika Mobile Corporation [Member] - Holdback Liability [Member] $ in Thousands	12 Months Ended
	Sep. 30, 2021 USD ($)
Balance at acquisition date	$ 613
Accretion	46
Currency translation	28
Balance at September 30, 2021	$ 687