Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 86,288	$ 93,405
Accounts receivable, net of allowance for doubtful accounts of $221 and $90 as of September 30, 2016 and December 31, 2015	8,520	6,643
Prepaid expenses and other current assets	3,710	3,082
Total current assets	98,518	103,130
Noncurrent assets:
Property and equipment, net	33,658	31,754
Intangible assets, net	2,193	636
Goodwill	9,039	5,396
Other noncurrent assets	538	498
TOTAL ASSETS	143,946	141,414
Current liabilities:
Accounts payable	5,500	4,426
Accrued expenses and other liabilities	10,099	7,911
Deferred revenue, current portion	4,486	3,367
Other current liabilities	984	645
Total current liabilities	21,069	16,349
Noncurrent liabilities
Deferred revenue, noncurrent portion	2,909	1,886
Deferred rent, noncurrent portion	1,359	1,254
Financing obligation on leases, noncurrent portion	15,640	15,961
Other noncurrent liabilities	996	181
Total liabilities	41,973	35,631
Commitments and contingencies (Note 7)
Stockholders' equity:
Additional paid-in capital	285,641	270,436
Accumulated other comprehensive loss	(247)	(271)
Accumulated deficit	(183,421)	(164,382)
Total stockholders' equity	101,973	105,783
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	143,946	141,414
Common Class A
Stockholders' equity:
Common stock	0	0
Common Class B
Stockholders' equity:
Common stock	$ 0	$ 0