Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 803,144	$ 234,092
Marketable securities	8,010	34,117
Short-term deposits	2,276	30,053
Trade receivables (net of allowances of $2,226 and $1,250 at September 30, 2021 and December 31, 2020, respectively)	71,382	94,229
Prepaid expenses and other current assets	26,737	27,357
Total current assets	911,549	419,848
Long-term assets:
Operating lease right-of-use asset	65,223	47,924
Property and equipment, net	34,163	37,163
Intangible assets, net	4,695	5,846
Goodwill	23,135	23,135
Other assets	19,717	21,566
Total long-term assets	146,933	135,634
Total assets	1,058,482	555,482
Current liabilities:
Trade payables	3,446	850
Accrued expenses and other short-term liabilities	91,917	83,198
Deferred revenues	86,253	98,588
Total current liabilities	181,616	182,636
Long-term liabilities:
Convertible senior notes, net	223,584	218,460
Operating lease liability	70,318	54,540
Deferred revenues	1,872	2,778
Other liabilities	4,122	2,997
Total long-term liabilities	299,896	278,775
Stockholders’ equity:
Common stock of $0.001 par value - Authorized: 200,000,000 shares at September 30, 2021 and December 31, 2020; Issued and outstanding: 107,321,063 shares at September 30, 2021 and 95,456,862 shares at December 31, 2020	107	95
Accumulated other comprehensive income	2,528	9,371
Additional paid-in capital	976,995	395,347
Accumulated deficit	(402,660)	(310,742)
Total stockholders’ equity	576,970	94,071
Total liabilities and stockholders’ equity	$ 1,058,482	$ 555,482