Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Accounts receivable, allowances	$ 245	$ 53
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	500,000	500,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	12,152,076	10,905,649
Common stock, shares outstanding (in shares)	12,139,360	10,892,933
Treasury Stock, Common, Shares (in shares)	12,716	12,716
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	4,500	4,500
Preferred stock, shares issued (in shares)	0	0
Preferred stock, dividend rate	9.00%	9.00%
Preferred stock, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares outstanding (in shares)	0	0
Series B Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, dividend rate	5.00%	5.00%
Preferred stock, liquidation preference (in dollars per share)	$ 0.01	$ 0.01