Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Accounts receivable, allowances	$ 53	$ 261
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)	10,905,649	9,064,821
Common stock, shares outstanding (in shares)	10,892,933	9,052,105
Treasury stock, 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, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, dividend rate	9.00%	9.00%
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, liquidation preference (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, dividend rate	5.00%	5.00%