Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 53,478	$ 48,315
Short-term investments	74,963	65,493
Trade receivables (net of allowance for doubtful accounts of $575 and $372 at September 30, 2017 and December 31, 2016, respectively)	44,680	53,861
Prepaid expenses and other current assets	5,500	3,650
Total current assets	178,621	171,319
Long-term assets:
Other assets	861	609
Property and equipment, net	11,512	9,910
Total long-term assets	12,373	10,519
Total assets	190,994	181,838
Current liabilities:
Trade payables	1,366	1,288
Accrued expenses and other short term liabilities	32,166	28,479
Deferred revenues	58,383	58,478
Total current liabilities	91,915	88,245
Long-term liabilities:
Deferred revenues	5,047	3,562
Severance pay	1,705	1,664
Other liabilities	5,283	5,628
Total long-term liabilities	12,035	10,854
Stockholders’ equity:
Common stock of $0.001 par value - Authorized: 200,000,000 shares at September 30, 2017 and December 31, 2016; Issued and outstanding: 27,826,524 shares at September 30, 2017 and 26,821,762 shares at December 31, 2016	28	27
Accumulated other comprehensive income (loss)	1,009	(479)
Additional paid-in capital	213,995	189,335
Accumulated deficit	(127,988)	(106,144)
Total stockholders’ equity	87,044	82,739
Total liabilities and stockholders’ equity	$ 190,994	$ 181,838