Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 6,782	$ 8,134
Accounts receivable, net of allowance for doubtful accounts of $98 and $20 as of September 30, 2014 and December 31, 2013, respectively	10,732	9,873
Accounts receivable—related parties	2,981	2,301
Prepaid expenses and other current assets	5,353	3,529
Total current assets	25,848	23,837
Property and equipment, net	9,432	6,297
Restricted cash		146
Goodwill	3,068	3,068
Other assets	5,233	1,112
Total assets	43,581	34,460
Current liabilities:
Accounts payable	4,438	1,880
Accrued liabilities	3,480	2,707
Accrued compensation	7,080	6,577
Convertible preferred stock warrant liabilities	909	760
Deferred revenue, current portion	7,219	7,655
Bank borrowings, current portion	8,056	3,471
Capital lease obligations, current portion	988	574
Total current liabilities	32,170	23,624
Deferred revenue, net of current portion	152	329
Bank borrowings, net of current portion	1,557	2,914
Capital lease obligations, net of current portion	1,535	804
Other long-term liabilities	2,986	2,644
Total liabilities	38,400	30,315
Convertible preferred stock, $0.001 par value—14,666 shares authorized;14,445 shares issued and outstanding as of September 30, 2014 and December 31, 2013 (aggregate liquidation preference of $103,494)	102,224	102,224
Stockholders’ deficit:
Common stock, $0.001 par value—30,000 shares authorized as of September 30, 2014, and 27,800 as of December 31, 2013; 7,708 and 7,444 shares issued and outstanding as of September 30, 2014 and December 31, 2013, respectively	8	7
Additional paid-in capital	257,429	253,917
Accumulated other comprehensive loss	(1,640)	(1,730)
Accumulated deficit	(352,840)	(350,273)
Total stockholders’ deficit	(97,043)	(98,079)
Total liabilities, convertible preferred stock and stockholders’ deficit	$ 43,581	$ 34,460