Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 43,160	$ 59,887
Accounts receivable, net of allowance for doubtful accounts of $3 and $69 as of December 31, 2016 and 2015, respectively	79,027	70,778
Prepaid expenses and other current assets	2,405	3,721
Total current assets	124,592	134,386
Long-term assets:
Restricted cash	770	600
Property and equipment, net of accumulated depreciation of $11,282 and $6,716 as of December 31, 2016 and 2015, respectively	9,656	10,094
Intangible assets, net of accumulated amortization of $29,012 and $24,488 as of December 31, 2016 and 2015, respectively	6,922	11,469
Goodwill	10,758	10,781
Other assets	1,527	794
Total long-term assets	29,633	33,738
Total assets	154,225	168,124
Current liabilities:
Accounts payable and accrued expenses	64,691	58,742
Deferred rent, short-term	704	401
Contingent consideration on acquisition, short-term	2,483	987
Deferred revenue	5	108
Capital leases, short-term	362
Other current liabilities	179
Total current liabilities	68,424	60,238
Long-term liabilities:
Deferred rent	6,072	5,237
Contingent consideration on acquisition		443
Deferred tax liabilities	447	510
Capital leases	760
Other liabilities		264
Total liabilities	75,703	66,692
Commitments and contingencies
Stockholders' equity:
Common stock, $0.0001 par value: 250,000,000 shares authorized as of December 31, 2016 and 2015, respectively; 50,431,324 and 52,214,384 shares issued and outstanding as of December 31, 2016 and 2015, respectively	5	5
Treasury stock, at cost 2,861,632 and 0 shares, respectively	(6,037)
Additional paid-in capital	283,486	279,136
Accumulated other comprehensive (loss) income	(331)	(55)
Accumulated deficit	(198,601)	(177,654)
Total stockholders' equity	78,522	101,432
Total liabilities and stockholders' equity	$ 154,225	$ 168,124