CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 21,983	$ 27,544
Restricted cash	1,293	1,293
Accounts receivable, net	11,000	12,237
Prepaid expenses and other current assets	5,652	3,989
Total current assets	39,928	45,063
Property and equipment, net	14,579	15,559
Goodwill	16,816	16,768
Intangible assets, net	3,785	4,475
Other non-current assets	2,357	1,504
Total assets	77,465	83,369
Current liabilities
Accounts payable	2,762	2,826
Accrued expenses and other current liabilities	8,474	10,474
Capital lease obligations	1,438	1,416
Total current liabilities	12,674	14,716
Capital lease obligations, non-current	1,347	1,687
Other long-term liabilities	4,158	4,183
Total liabilities	18,179	20,586
Commitments and contingencies (Note 13)
Stockholders’ equity
Common stock, $0.001 par value - 142,857 shares authorized, 5,748 and 5,729 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	6	6
Additional paid-in capital	292,099	291,163
Accumulated deficit	(232,581)	(227,704)
Accumulated other comprehensive loss	(238)	(682)
Total stockholders’ equity	59,286	62,783
Total liabilities and stockholders’ equity	$ 77,465	$ 83,369