Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 76,320	$ 43,160
Accounts receivable, net	59,288	29,429
Prepaid expenses and other current assets	2,499	1,833
Current assets of discontinued operations	0	50,170
Total current assets	138,107	124,592
Long-term assets:
Restricted cash	0	770
Property and equipment, net	3,194	7,141
Intangible assets, net	1,307	1,544
Goodwill	6,320	6,228
Deferred tax asset	332	0
Other assets	1,168	1,251
Non-current assets of discontinued operations	0	12,699
Total long-term assets	12,321	29,633
Total assets	150,428	154,225
Current liabilities:
Accounts payable and accrued expenses	59,419	32,998
Deferred rent, short-term	808	704
Contingent consideration on acquisition, short-term	0	2,483
Deferred income	674	0
Other current liabilities	53	179
Current liabilities of discontinued operations	0	32,060
Total current liabilities	60,954	68,424
Long-term liabilities:
Deferred rent	5,260	5,996
Deferred tax liabilities	338	447
Other liabilities	737	0
Non-current liabilities of discontinued operations	0	836
Total liabilities	67,289	75,703
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.0001 par value: 250,000,000 shares authorized as of December 31, 2017 and 2016, respectively; 55,136,038 and 53,292,956 shares issued and 51,290,542 and 50,431,324 shares outstanding as of December 31, 2017 and 2016, respectively	5	5
Treasury stock, 3,845,496 and 2,861,632 shares at cost as of December 31, 2017 and 2016, respectively	(8,443)	(6,037)
Additional paid-in capital	288,277	283,486
Accumulated other comprehensive loss	(232)	(331)
Accumulated deficit	(196,468)	(198,601)
Total stockholders’ equity	83,139	78,522
Total liabilities and stockholders’ equity	$ 150,428	$ 154,225