Note 3 - Revenue Recognition (Details Textual) - Gift Cards [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2019
Contract with Customer, Liability, Total	$ 1,200		$ 1,200		$ 1,000
Contract with Customer, Liability, Revenue Recognized	$ 0	$ 200	$ 800	$ 500