Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 231,458	$ 68,929
Marketable securities	34,112	41,531
Short-term deposits	60,000	10,000
Trade receivables (net of allowances of $1,283 and $637 at September 30, 2020 and December 31, 2019, respectively)	60,111	75,050
Prepaid expenses and other current assets	15,450	13,047
Total current assets	401,131	208,557
Long-term assets:
Other assets	21,686	18,360
Operating lease right-of-use asset	43,683	55,057
Property and equipment, net	36,019	36,338
Total long-term assets	101,388	109,755
Total assets	502,519	318,312
Current liabilities:
Trade payables	767	997
Accrued expenses and other short-term liabilities	66,483	62,607
Deferred revenues	81,192	95,975
Total current liabilities	148,442	159,579
Long-term liabilities:
Convertible senior notes, net	216,791	0
Deferred revenues	3,300	5,460
Operating lease liability	48,377	57,040
Other liabilities	2,689	2,701
Total long-term liabilities	271,157	65,201
Stockholders’ equity:
Common stock of $0.001 par value - Authorized: 200,000,000 shares at September 30, 2020 and December 31, 2019; Issued and outstanding: 31,725,314 shares at September 30, 2020 and 30,583,311 shares at December 31, 2019	32	31
Accumulated other comprehensive income (loss)	3,665	(449)
Additional paid-in capital	370,933	310,682
Accumulated deficit	(291,710)	(216,732)
Total stockholders’ equity	82,920	93,532
Total liabilities and stockholders’ equity	$ 502,519	$ 318,312