Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 77,976	$ 81,912
Marketable investments	241,973	209,907
Accounts receivable, net	37,655	24,797
Prepaid expenses and other current assets	10,656	8,014
Deferred contract acquisition costs	13,014	9,372
Total current assets	381,274	334,002
Property and equipment, net	33,190	25,885
Operating Lease, Right-of-Use Asset	8,746
Intangible assets, net	15,533	631
Goodwill	11,798	11,798
Other assets	1,184	836
Deferred contract acquisition costs — less current portion	30,655	21,514
Total assets	482,380	394,666
Current liabilities:
Accounts payable	10,156	7,010
Accrued and other current liabilities	18,385	13,771
Operating lease liabilities	5,064
Accrued federal fees	2,303	1,434
Sales tax liabilities	1,885	1,741
Finance lease liabilities	3,518	6,647
Deferred revenue	24,681	17,391
Total current liabilities	65,992	47,994
Convertible senior notes	209,604	196,763
Sales tax liabilities — less current portion	838	841
Operating lease liabilities — less current portion	4,329
Finance lease liabilities — less current portion	809	4,509
Other long-term liabilities	4,350	1,811
Total liabilities	285,922	251,918
Commitments and contingencies (Note 10)
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000 shares authorized, no shares issued and outstanding as of December 31, 2019 and 2018	0	0
Common stock, $0.001 par value; 450,000 shares authorized, 61,544 shares and 59,210 shares issued and outstanding as of December 31, 2019 and 2018, respectively	61	59
Additional paid-in capital	351,870	294,279
Accumulated other comprehensive income (loss)	576	(93)
Accumulated deficit	(156,049)	(151,497)
Total stockholders’ equity	196,458	142,748
Total liabilities and stockholders’ equity	$ 482,380	$ 394,666