Note 15 - Share-based Compensation - Restricted Stock Activity (Details) - Restricted Stock Units (RSUs) [Member]	9 Months Ended
	Jun. 30, 2020 $ / shares shares
Number of Shares Outstanding (in shares) | shares	274,849
Weighted Average Grant Date Fair Value, Outstanding (in dollars per share) | $ / shares	$ 2.59
Number of Shares Granted (in shares) | shares	231,270
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	$ 2.95
Number of Shares Released (in shares) | shares	(198,106)
Weighted Average Grant Date Fair Value, Released (in dollars per share) | $ / shares	$ 2.66
Number of Shares Forfeited/cancelled (in shares) | shares	(4,999)
Weighted Average Grant Date Fair Value, Forfeited/cancelled (in dollars per share) | $ / shares	$ 2.58
Number of Shares Outstanding (in shares) | shares	303,014
Weighted Average Grant Date Fair Value, Outstanding (in dollars per share) | $ / shares	$ 2.82