Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities
Net income/(loss)	$ 2,203	$ (6,969)
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation, amortization and other	200	235
Stock-based compensation	5,427	6,529
Deferred rent	(115)	(70)
Accretion to interest income	79	(6)
(Increase)/decrease in operating assets and liabilities:
Accounts receivable	(912)	(842)
Other assets	(510)	88
Fund management and administration payable	3,152	760
Compensation and benefits payable	(651)	(406)
Accounts payable and other liabilities	556	12
Net cash provided by/(used in) operating activities	9,429	(669)
Cash flows from investing activities
Purchase of fixed assets	(84)	(87)
Purchase of investments	(5,833)	(6,114)
Proceeds from the redemption of investments	5,116	7,183
Net cash (used in)/provided by investing activities	(801)	982
Cash flows from financing activities
Shares repurchased	(2,130)
Proceeds from exercise of stock options	321	1
Net cash (used in)/provided by financing activities	(1,809)	1
Net increase in cash and cash equivalents	6,819	314
Cash and cash equivalents- beginning of period	14,233	11,476
Cash and cash equivalents- end of period	21,052	11,790
Supplemental disclosure of cash flow information
Cash paid for income taxes	12	11
Non-cash investing and financing activities:
Cashless exercise of stock options	$ 391	$ 60