Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 176,523	$ 66,449
Accounts receivable, net of allowance for doubtful accounts of $3,070 and $2,276, in 2019 and 2018, respectively	87,620	46,023
Prepaid expenses and other current assets	13,964	9,252
Total current assets	278,107	121,724
Operating lease right of use asset	15,680
Property and equipment, net	76,236	43,735
Contract acquisition costs	31,965	13,361
Intangibles, net	11,812	13,832
Goodwill	94,987	95,031
Deferred tax assets	2,179	713
Other assets	1,744	1,707
Total assets	512,710	290,103
CURRENT LIABILITIES:
Accounts payable	12,302	8,174
Accrued expenses and other current liabilities	62,778	50,662
Deferred revenue	88,751	55,015
Operating lease liability	6,602
Total current liabilities	170,433	113,851
Deferred revenue, net of current portion	438	222
Convertible senior notes, net	179,012	0
Other liabilities	72	4,205
Operating lease liability, net of current portion	12,865
Deferred tax liability	1,355	1,096
Total liabilities	364,175	119,374
Commitments and contingencies (See Note 9)
STOCKHOLDERS' EQUITY:
Preferred stock, $0.001 par value - 5,000,000 shares authorized, none issued	0	0
Common stock, $0.001 par value - 200,000,000 and 100,000,000 shares authorized, 66,543,073 and 63,676,229 shares issued, and 63,833,243 and 60,994,944 shares outstanding as of December 31, 2019 and 2018, respectively	67	64
Additional paid-in capital	436,557	362,590
Treasury stock, at cost; 2,709,830 and 2,681,285 shares respectively	(3)	(3)
Accumulated deficit	(283,562)	(187,491)
Accumulated other comprehensive loss	(4,524)	(4,431)
Total stockholders’ equity	148,535	170,729
Total liabilities and stockholders’ equity	$ 512,710	$ 290,103