Condensed Consolidated Statements of Financial Condition (USD $)	Sep. 30, 2011	Sep. 30, 2010
Cash	$ 6,698,000	$ 5,390,000
Deposit with clearing organizations	1,157,000	1,159,000
Receivables from broker dealers and clearing organizations	2,714,000	3,518,000
Other receivables, net of allowance for uncollectible accounts of $310,000 and $402,000, respectively	299,000	804,000
Advances to registered representatives - Current portion	719,000	1,026,000
Securities owned: marketable – at market value	454,000	680,000
Securities owned: nonmarketable – at fair value	24,000	57,000
Total Current Assets	12,065,000	12,634,000
Advances to registered representatives - Long term portion	233,000	415,000
Fixed assets, net	974,000	1,127,000
Secured demand note	0	500,000
Intangible assets, net	1,087,000	1,708,000
Investment in unconsolidated joint venture	1,051,000
Other assets	951,000	996,000
Total Assets	16,361,000	17,380,000
LIABILITIES AND STOCKHOLDERS' DEFICIT
Accounts payable, accrued expenses and other liabilities	10,754,000	11,079,000
Derivative liabilities		4,331,000
Payable to broker dealers and clearing organizations	139,000	169,000
Securities sold, but not yet purchased, at market	2,000	21,000
Convertible notes payable, net of debt discount of $247,000	5,753,000
Notes payable - related Party		500,000
Total Current Liabilities	16,648,000	16,100,000
Accrued expenses and other liabilities - Long term portion	1,078,000	864,000
Convertible notes payable, net of debt discount of $642,000		5,358,000
Total Liabilities, before subordinated borrowings and other liabilities	17,726,000	22,322,000
Subordinated borrowings	100,000	750,000
Total Liabilities	17,826,000	23,609,000
National Holdings Corporation Stockholders' Deficit
Common stock, $.02 par value, 150,000,000 shares authorized; 20,446,704 shares issued and outstanding, at September 30, 2011 and 17,276,704 issued and outstanding at September 30, 2010	409,000	346,000
Additional paid-in capital	45,066,000	43,132,000
Subscription receivable		(1,334,000)
Accumulated deficit	(53,128,000)	(48,415,000)
Total National Holdings Corporation Stockholders' Deficit	(1,497,000)	(6,271,000)
Non Controlling Interest	32,000	42,000
Total Liabilities and Stockholders' Deficit	16,361,000	17,380,000
Cumulative Preferred Stock Series A [Member]
LIABILITIES AND STOCKHOLDERS' DEFICIT
Preferred Stock
Convertible Preferred Stock Series C And D [Member]
LIABILITIES AND STOCKHOLDERS' DEFICIT
Preferred Stock	6,156,000
Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS' DEFICIT
Preferred Stock	$ 0	$ 537,000