Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 32,144	$ 32,533
Restricted cash, short-term		21
Accounts receivable, net of allowance for doubtful accounts of $1,050, $1,080 and $1,080 as of December 31, 2012, June 30, 2013 and pro forma June 30, 2013, respectively	39,213	36,011
Prepaid expenses and other current assets	4,214	953
Total current assets	75,571	69,518
Long-term assets:
Restricted cash, long-term	600	1,200
Property and equipment, net of accumulated depreciation of $3,077, $3,634 and $3,634 as of December 31, 2012, June 30, 2013 and pro forma June 30, 2013, respectively	2,842	1,995
Intangible assets, net of accumulated amortization of $10,315, $12,753 and $12,753 as of December 31, 2012, June 30, 2013 and pro forma June 30, 2013, respectively	22,947	25,385
Goodwill	29,719	29,719
Deferred tax assets, long-term	1,695	1,695
Other long-term assets	196	211
Total long-term assets	57,999	60,205
Total assets	133,570	129,723
Current liabilities:
Accounts payable and accrued expenses	28,948	21,075
Deferred rent and security deposits payable	707	627
Deferred revenue	189	210
Deferred tax liabilities, short-term	1,695	1,695
Amounts outstanding under credit facility and accrued interest expenses	6,019	6,019
Total current liabilities	37,558	29,626
Warrants to purchase mandatorily redeemable convertible preferred stock	926	1,103
Total liabilities	38,484	30,729
Commitments and contingent liabilities
Mandatorily redeemable convertible preferred stock	162,657	162,466
Share capital:
Additional paid-in capital	19,235	17,752
Accumulated other comprehensive income	195	345
Accumulated deficit	(87,002)	(81,570)
Total stockholders' (deficit) equity	(67,571)	(63,472)
Total liabilities, mandatorily redeemable securities and stockholders' (deficit) equity	133,570	129,723
Pro Forma
Current Assets:
Cash and cash equivalents	101,894
Accounts receivable, net of allowance for doubtful accounts of $1,050, $1,080 and $1,080 as of December 31, 2012, June 30, 2013 and pro forma June 30, 2013, respectively	39,213
Prepaid expenses and other current assets	1,317
Total current assets	142,424
Long-term assets:
Restricted cash, long-term	600
Property and equipment, net of accumulated depreciation of $3,077, $3,634 and $3,634 as of December 31, 2012, June 30, 2013 and pro forma June 30, 2013, respectively	2,842
Intangible assets, net of accumulated amortization of $10,315, $12,753 and $12,753 as of December 31, 2012, June 30, 2013 and pro forma June 30, 2013, respectively	22,947
Goodwill	29,719
Deferred tax assets, long-term	1,695
Other long-term assets	196
Total long-term assets	57,999
Total assets	200,423
Current liabilities:
Accounts payable and accrued expenses	28,948
Deferred rent and security deposits payable	707
Deferred revenue	189
Deferred tax liabilities, short-term	1,695
Amounts outstanding under credit facility and accrued interest expenses	6,019
Total current liabilities	37,558
Total liabilities	37,558
Share capital:
Additional paid-in capital	265,380
Accumulated other comprehensive income	195
Accumulated deficit	(102,715)
Total stockholders' (deficit) equity	162,865
Total liabilities, mandatorily redeemable securities and stockholders' (deficit) equity	200,423
Common stock
Share capital:
Common stock	1	1
Common stock | Pro Forma
Share capital:
Common stock	5
Series II common stock
Share capital:
Common stock
Series II common stock | Pro Forma
Share capital:
Common stock