Condensed Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
REVENUE:
Retail trading revenue	$ 34,316	$ 52,156	$ 104,590	$ 146,068
Institutional trading revenue	4,189	1,202	12,167	3,109
Other revenue	1,403	811	2,181	1,527
Total non-interest revenue	39,908	54,169	118,938	150,704
Interest revenue	119	92	405	345
Interest expense	(42)	(334)	(428)	(1,150)
Total net interest revenue / (expense)	77	(242)	(23)	(805)
Net revenue	39,985	53,927	118,915	149,899
EXPENSES:
Employee compensation and benefits	11,905	11,563	35,424	34,907
Selling and marketing	5,748	8,788	20,116	27,954
Trading expenses and commissions	8,927	9,927	26,862	25,544
Bank fees	819	1,286	2,505	3,409
Depreciation and amortization	1,126	986	3,234	2,886
Purchased intangible amortization	565	2,720	3,450	6,376
Communications and data processing	786	702	2,289	2,114
Occupancy and equipment	1,219	1,154	3,511	3,468
Bad debt provision	46	173	248	776
Professional fees	1,551	1,881	3,557	3,844
Product development, software and maintenance	1,105	1,019	3,319	2,969
Restructuring			634
Other	1,757	1,945	5,205	5,631
Total	35,554	42,144	110,354	119,878
INCOME BEFORE INCOME TAX EXPENSE	4,431	11,783	8,561	30,021
Income tax expense	1,210	4,165	2,152	10,987
NET INCOME	3,221	7,618	6,409	19,034
Other comprehensive income /(loss), net of tax:
Foreign currency translation adjustment	210	(342)	638	521
NET COMPREHENSIVE INCOME	3,431	7,276	7,047	19,555
Net income	$ 3,221	$ 7,618	$ 6,409	$ 19,034
Earnings per common share:
Basic	$ 0.09	$ 0.22	$ 0.18	$ 0.55
Diluted	$ 0.08	$ 0.20	$ 0.16	$ 0.49
Weighted average common shares outstanding used in computing earnings per common share:
Basic	35,250,404	34,625,525	34,893,622	34,313,987
Diluted	38,560,657	38,916,038	38,927,673	39,025,699