Consolidated Statements Of Financial Condition (USD $)	Dec. 31, 2011	Sep. 30, 2011
Current Assets
Cash	$ 6,143,000	$ 6,698,000
Deposit with clearing organizations	1,157,000	1,157,000
Receivables from broker dealers and clearing organizations	2,411,000	2,714,000
Other receivables, net of allowance for uncollectible accounts of $419,000 and $310,000, respectively	108,000	299,000
Advances to registered representatives - Current portion	531,000	719,000
Securities owned: marketable - at market value	936,000	454,000
Securities owned: nonmarketable - at fair value	40,000	24,000
Other assets	626,000	647,000
Total Current Assets	11,952,000	12,712,000
Advances to registered representatives - Long term portion	294,000	233,000
Fixed assets, net	902,000	974,000
Intangible assets, net	932,000	1,087,000
Investment in unconsolidated joint venture	1,051,000	1,051,000
Other assets	299,000	304,000
Total Assets	15,430,000	16,361,000
Current Liabilities
Accounts payable, accrued expenses and other liabilities	10,365,000	10,754,000
Payable to broker dealers and clearing organizations	123,000	139,000
Securities sold, but not yet purchased, at market	4,000	2,000
Convertible notes payable, net of debt discount of $148,000 and $247,000, respectively	5,852,000	5,753,000
Total Current Liabilities	16,344,000	16,648,000
Accrued expenses and other liabilities - Long term portion	1,045,000	1,078,000
Total Liabilities, before subordinated borrowings and other liabilities	17,389,000	17,726,000
Subordinated borrowings	70,000	100,000
Total Liabilities	17,459,000	17,826,000
National Hodldings Corporation Stockholders' Deficit
Common stock, $.02 par value, 150,000,000 shares authorized; 26,088,530 and 17,276,704 shares issued and outstanding at December 31 and September 30, 2011, respectively	522,000	409,000
Additional paid-in capital	46,124,000	45,066,000
Accumulated deficit	(54,851,000)	(53,128,000)
Total National Holdings Corporation Stockholders' Deficit	(2,049,000)	(1,497,000)
Non Controlling Interest	20,000	32,000
Total Liabilities and Stockholders' Deficit	15,430,000	16,361,000
Cumulative Preferred Stock Series A [Member]
National Hodldings Corporation Stockholders' Deficit
Preferred stock	0	0
Convertible Preferred Stock Series C And D [Member]
National Hodldings Corporation Stockholders' Deficit
Preferred stock	$ 6,156,000	$ 6,156,000