Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 111,845	$ 43,819
Restricted cash — current	2,000	2,000
Accounts receivable, net of allowances of $1,490 and $2,184 at June 30, 2014 and December 31, 2013, respectively (includes related party receivables of $812 and $431 at June 30, 2014 and December 31, 2013, respectively)	24,829	18,803
Notes receivable from related parties — current	296	178
Prepaid expenses	6,866	3,550
Other current assets (includes related party receivables of $363 at December 31, 2013)	860	1,226
Total current assets	146,696	69,576
Property and equipment, net	17,104	15,238
Goodwill	53,270	53,270
Intangible assets, net	30,005	31,834
Notes receivable from related parties		2,682
Other assets	518	2,150
Total assets	247,593	174,750
Current liabilities
Accounts payable (includes related party payables of $1,307 and $1,161 at June 30, 2014 and December 31, 2013, respectively)	9,229	9,804
Accrued employee expenses	10,028	10,129
Revolving line of credit		4,764
Other accrued expenses	10,989	6,242
Total current liabilities	30,246	30,939
Deferred tax liabilities	2,104	1,791
Other liabilities	521	616
Total liabilities	32,871	33,346
Commitments and contingencies (Note 7)
Series A convertible preferred stock — $0.0001 par value; 4,500,000 shares authorized at December 31, 2013; no shares and 2,857,143 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively		29,224
Stockholders' Equity
Preferred stock — $0.0001 par value; 20,000,000 shares authorized at June 30, 2014; no shares issued and outstanding at June 30, 2014 and December 31, 2013
Common stock — $0.0001 par value; 1,000,000,000 shares authorized at June 30, 2014 and 150,000,000 shares authorized at December 31, 2013; 76,814,334 and 59,955,343 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	8	6
Additional paid-in capital	402,229	275,803
Notes receivable from related parties		(1,069)
Accumulated deficit	(187,515)	(162,560)
Total stockholders' equity	214,722	112,180
Total liabilities, convertible preferred stock and stockholders' equity	$ 247,593	$ 174,750