Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 37,326	$ 68,253
Accounts receivable, net	21,718	18,726
Prepaid expenses and other current assets	4,186	4,751
Total current assets	63,230	91,730
Property and equipment, net	21,817	16,274
Goodwill	19,417	11,527
Intangible assets, net	10,405	7,399
Other noncurrent assets	1,323	1,287
Total assets	116,192	128,217
Current liabilities
Accounts payable	1,710	3,737
Accrued expenses and other current liabilities	11,185	12,053
Deferred revenues	1,430	2,052
Current portion of long-term debt	1,384	2,587
Total current liabilities	15,709	20,429
Long-term debt, less current portion	1,557	621
Other long-term liabilities	4,795	1,050
Total liabilities	$ 22,061	$ 22,100
Commitments and contingencies (Note 16)
Stockholders’ equity
Convertible preferred stock, $0.001 par value - 10,000 shares authorized, no shares issued and outstanding
Common stock, $0.001 par value - 500,000 shares authorized, 37,568 and 35,846 shares issued, 37,419 and 35,181 outstanding at December 31, 2015, and December 31, 2014, respectively	$ 37	$ 35
Additional paid-in capital	275,604	253,221
Accumulated deficit	(179,733)	(146,392)
Accumulated other comprehensive loss	(1,777)	(747)
Total stockholders’ equity	94,131	106,117
Total liabilities and stockholders' equity	$ 116,192	$ 128,217