Consolidated Statements Of Financial Condition (Parentheticals) (USD $)	Dec. 31, 2011	Sep. 30, 2011
Current Assets
Allowance for uncollectible accounts	$ 419,000	$ 310,000
Current Liabilities
Debt discount	$ 148,000	$ 247,000
National Hodldings Corporation Stockholders' Deficit
Common stock par value	$ 0.02	$ 0.02
Common stock shares authorized	150,000,000	150,000,000
Common stock shares issued	26,088,530	17,276,704
Common stock shares outstanding	26,088,530	17,276,704
Cumulative Preferred Stock Series A [Member]
National Hodldings Corporation Stockholders' Deficit
Preferred stock par value	$ 0.01	$ 0.01
Preferred stock shares authorized	50,000	50,000
Preferred stock shares issued	46,050	0
Preferred stock shares outstanding	46,050	0
Convertible Preferred Stock Series C And D [Member]
National Hodldings Corporation Stockholders' Deficit
Preferred stock par value	$ 0.01	$ 0.01
Preferred stock shares authorized	10,000,000	10,000,000
Preferred stock shares issued	94,167	94,167
Preferred stock shares outstanding	94,167	94,167