CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net income (loss)	$ (10,500)	$ 16,589	$ (34,021)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	179	419	774
(Gains) losses on sales of fixed assets		(125)	214
Intangible impairment charge	0	576	0
Deferred income tax	0	(228)	0
Change in contingent consideration liability	0	1,400	0
Expenses for share-based compensation awards		2,875	2,903
Acquisition of subsidiary escrow shares returned		(82)	0
Changes in assets and liabilities:
(Increase) decrease in accounts receivable		(38,788)	6,240
(Increase) decrease in other current assets		(2,259)	1,041
Decrease in other assets		2,208	0
(Decrease) in accounts payable and accrued expenses		(473)	(2,565)
(Decrease) in deferred revenue - current		0	(833)
(Decrease) in other liabilities		(2)	(163)
Net cash used in operating activities		(17,890)	(26,410)
Cash flows from investing activities:
Cash acquired in acquisition of subsidiary		0	1,888
Capital expenditures		(327)	(77)
Proceeds from sales of fixed assets		128	153
Proceeds from redemption of auction rate securities		0	1,100
Net cash (used in) provided by investing activities		(199)	3,064
Cash flows from financing activities:
Equity issuance costs in connection with acquisition of subsidiary		0	(45)
Proceeds from public offering of common stock, net of underwriting discounts and commissions and offering expenses		37,459	40,079
Proceeds from the exercise of stock options		0	71
Net cash provided by financing activities		37,459	40,105
Net increase in cash and cash equivalents		19,370	16,759
Cash and cash equivalents at beginning of period		65,860	58,838
Cash and cash equivalents at end of period	75,597	85,230	75,597
Supplemental disclosure of cash flow information:
Contingent consideration liability	15,900	17,100	15,900
Stock acquisition consideration	$ 11,265		$ 11,265