CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (12,286)	$ (38,620)
Adjustments to reconcile net loss to cash (used in) provided by operating activities:
Stock-based compensation expense	6,229	6,208
Bad debt expense	682	1,335
Depreciation and amortization	7,005	6,230
Deferred income tax (benefit) expense	(4,527)	25,846
Loss on disposal of equipment	246	752
Net change in:
Restricted cash	(9)	15
Accounts receivable	5,672	11,149
Inventory	(506)	1
Prepaid expenses and other current assets	(1,593)	662
Income tax receivable	391	(2,080)
Other assets	(1,662)	(78)
Accounts payable	961	(377)
Accrued compensation	(4,180)	1,476
Other current liabilities	(8,092)	(6,690)
Other long term liabilities	329	(44)
Deferred revenue	7,606	5,707
Net cash (used in) provided by operating activities	(3,734)	11,492
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(6,415)	(2,939)
Proceeds from available-for-sale securities		9,711
Acquisition, net of cash acquired	(25,675)
Net cash (used in) provided by investing activities	(32,090)	6,772
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from the exercise of stock options	2,379	830
Repurchase of shares from exercised stock options	(1,040)
Proceeds from equity offering, net of issuance costs	(228)
Payments under capital lease obligations	(213)	(5)
Net cash provided by financing activities	898	825
(Decrease) increase in cash and cash equivalents	(34,926)	19,089
Effect of exchange rate changes in cash and cash equivalents	(160)	441
Net (decrease) increase in cash and cash equivalents	(35,086)	19,530
Cash and cash equivalents-beginning of year	148,190	106,516
Cash and cash equivalents-end of period	113,104	126,046
Cash paid during the periods for:
Interest	10
Income taxes	2,745	3,487
Noncash financing and investing activities:
Accrued liability for purchase of property and equipment	1,147	316
Equipment acquired under capital lease	586
Accrued merger consideration	$ 3,375

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The noncash component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The increase (decrease) during the reporting period in other current operating liabilities not separately disclosed in the statement of cash flows.

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The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as operating activities. This may include cash restricted for regulatory purposes.

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The amount of cash paid for interest during the period.

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Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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- Definition

The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration