Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 27,544	$ 34,420
Restricted cash	1,293	1,293
Accounts receivable, net	12,237	18,761
Prepaid expenses and other current assets	3,989	3,808
Total current assets	45,063	58,282
Property and equipment, net	15,559	20,581
Goodwill	16,768	19,318
Intangible assets, net	4,475	7,325
Other non-current assets	1,504	1,587
Total assets	83,369	107,093
Current liabilities
Accounts payable	2,826	2,434
Accrued expenses and other current liabilities	10,015	8,362
Deferred revenues	459	795
Capital lease obligations	1,416	1,015
Total current liabilities	14,716	12,606
Capital lease obligations, non-current	1,687	2,381
Other long-term liabilities	4,183	4,508
Total liabilities	20,586	19,495
Commitments and contingencies (Note 15)
Stockholders' equity
Convertible preferred stock, $0.001 par value - 10,000 shares authorized, no shares issued and outstanding at December 31, 2017 and December 31, 2016, respectively
Common stock, $0.001 par value - 142,857 shares authorized, 5,729 and 5,542 shares issued, 5,729 and 5,541 outstanding at December 31, 2017 and December 31, 2016, respectively	6	6
Additional paid-in capital	291,163	286,692
Accumulated deficit	(227,704)	(196,213)
Accumulated other comprehensive loss	(682)	(2,887)
Total stockholders' equity	62,783	87,598
Total liabilities and stockholders' equity	$ 83,369	$ 107,093