Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 155,863	$ 77,976
Marketable investments	170,433	241,973
Accounts receivable, net	39,972	37,655
Prepaid expenses and other current assets	13,396	10,656
Deferred contract acquisition costs	14,317	13,014
Total current assets	393,981	381,274
Property and equipment, net	34,940	33,190
Operating lease right-of-use assets	11,034	8,746
Intangible assets, net	14,543	15,533
Goodwill	11,798	11,798
Other assets	3,316	1,184
Deferred contract acquisition costs — less current portion	34,047	30,655
Total assets	503,659	482,380
Current liabilities:
Accounts payable	8,367	10,156
Accrued and other current liabilities	24,738	18,385
Operating lease liabilities	6,087	5,064
Accrued federal fees	1,754	2,303
Sales tax liabilities	1,723	1,885
Finance lease liabilities	2,812	3,518
Deferred revenue	25,632	24,681
Total current liabilities	71,113	65,992
Convertible senior notes	212,924	209,604
Sales tax liabilities — less current portion	843	838
Operating lease liabilities — less current portion	5,438	4,329
Finance lease liabilities — less current portion	286	809
Other long-term liabilities	6,589	4,350
Total liabilities	297,193	285,922
Commitments and contingencies
Stockholders’ equity:
Common stock	62	61
Additional paid-in capital	368,260	351,870
Accumulated other comprehensive income	1,630	576
Accumulated deficit	(163,486)	(156,049)
Total stockholders’ equity	206,466	196,458
Total liabilities and stockholders’ equity	$ 503,659	$ 482,380