Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 58,164	$ 47,659
Accounts receivable net of allowance for doubtful accounts of $1,265 and $982 as of June 30, 2019 and December 31, 2018 respectively.	116,566	104,387
Prepaid expenses and other current assets	3,933	3,381
Total current assets	178,663	155,427
Long-term assets:
Operating lease right-of-use asset, net of amortization	25,152	0
Property and equipment net of accumulated depreciation of $3,168 and $2,696 as of June 30, 2019 and December 31, 2018, respectively	2,336	2,789
Intangible assets, net	3,949	4,379
Goodwill	9,448	9,478
Deferred tax assets	126	193
Other assets	2,128	2,440
Total long-term assets	43,139	19,279
Total assets	221,802	174,706
Current liabilities:
Accounts payable and accrued expenses	133,617	109,991
Operating lease liability	5,017
Deferred rent		797
Contingent consideration on acquisition	0	1,500
Deferred income	459	69
Other current liabilities	116	817
Total current liabilities	139,209	113,174
Long-term liabilities:
Operating lease liability, net of current portion	26,255
Deferred rent, net of current portion		5,759
Deferred tax liabilities	1,145	1,153
Other non-current liabilities	203	225
Total liabilities	166,812	120,311
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.0001 par value: 250,000,000 shares authorized as of June 30, 2019 and December 31, 2018, 58,359,108 and 56,956,935 shares issued and 45,810,769 and 44,392,695 outstanding as of June 30, 2019 and December 31, 2018, respectively	4	4
Treasury stock, at cost: 12,564,240 shares as of June 30, 2019 and December 31, 2018	(31,980)	(31,980)
Additional paid-in capital	299,586	293,154
Accumulated other comprehensive loss	(969)	(949)
Accumulated deficit	(211,651)	(205,834)
Total stockholders’ equity	54,990	54,395
Total liabilities and stockholders’ equity	$ 221,802	$ 174,706