Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 52,984	$ 48,707
Marketable securities	41,397	39,770
Short-term deposits	37,000	70,438
Trade receivables (net of allowance for doubtful accounts of $645 and $483 at September 30, 2019 and December 31, 2018, respectively)	51,866	83,223
Prepaid expenses and other current assets	15,050	16,952
Total current assets	198,297	259,090
Long-term assets:
Other assets	15,621	8,565
Operating lease right-of-use asset	57,046
Property and equipment, net	27,188	17,323
Total long-term assets	99,855	25,888
Total assets	298,152	284,978
Current liabilities:
Trade payables	2,999	2,620
Accrued expenses and other short-term liabilities	53,694	55,991
Deferred revenues	76,978	87,729
Total current liabilities	133,671	146,340
Long-term liabilities:
Deferred revenues	5,489	6,487
Operating lease liability	58,667
Other liabilities	2,555	6,781
Total long-term liabilities	66,711	13,268
Stockholders’ equity:
Common stock of $0.001 par value - Authorized: 200,000,000 shares at September 30, 2019 and December 31, 2018; Issued and outstanding: 30,482,452 shares at September 30, 2019 and 29,576,880 shares at December 31, 2018	30	30
Accumulated other comprehensive income (loss)	771	(3,633)
Additional paid-in capital	299,051	266,941
Accumulated deficit	(202,082)	(137,968)
Total stockholders’ equity	97,770	125,370
Total liabilities and stockholders’ equity	$ 298,152	$ 284,978