Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 71,283	$ 88,888
Accounts receivable, net	158,248	217,571
Prepaid expenses and other current assets	7,323	6,591
TOTAL CURRENT ASSETS	236,854	313,050
Property and equipment, net	21,589	23,667
Right-of-use lease asset	19,549	21,491
Internal use software development costs, net	16,631	16,053
Intangible assets, net	10,325	11,386
Other assets, non-current	1,900	2,103
Goodwill	7,370	7,370
TOTAL ASSETS	314,218	395,120
Current liabilities:
Accounts payable and accrued expenses	194,036	259,439
Lease liabilities, current	7,158	7,282
Other current liabilities	929	778
TOTAL CURRENT LIABILITIES	202,123	267,499
Lease liabilities, non-current	13,441	15,231
Other liabilities, non-current	426	454
TOTAL LIABILITIES	215,990	283,184
Commitments and contingencies (Note 9)
STOCKHOLDERS' EQUITY
Preferred stock, $0.00001 par value, 10,000 shares authorized at March 31, 2020 and December 31, 2019; 0 shares issued and outstanding at March 31, 2020 and December 31, 2019	0	0
Common stock, $0.00001 par value; 500,000 shares authorized at March 31, 2020 and December 31, 2019; 55,060 and 53,888 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	1	1
Additional paid-in capital	449,820	453,064
Accumulated other comprehensive loss	(834)	(45)
Accumulated deficit	(350,759)	(341,084)
TOTAL STOCKHOLDERS' EQUITY	98,228	111,936
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 314,218	$ 395,120