Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 98,522	$ 101,267
Accounts receivable, net of allowance of $374 in both 2018 and in 2017	58,436	57,564
Prepaid expenses and other current assets	9,654	5,069
Total current assets	166,612	163,900
Property and equipment, net	26,536	25,386
Goodwill	1,923	1,923
Intangible assets, net	5,821	6,074
Deferred tax assets	15,896	16,348
Other non-current assets	9,752	10,545
Total assets	226,540	224,176
Current liabilities:
Accounts payable	2,588	2,536
Accrued compensation and related benefits	5,322	6,493
Accrued and other current liabilities	2,151	2,627
Deferred revenues – current portion	8,474	7,981
Total current liabilities	18,535	19,637
Long-term income taxes payable	4,824	3,902
Other non-current liabilities	1,122	2,269
Total liabilities	24,481	25,808
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.00015 par value, 5,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.00015 par value, 70,000 shares authorized: shares issued 40,026 and 39,799, respectively; shares outstanding 31,964 and 32,112, respectively	5	5
Additional paid-in-capital	301,867	297,950
Treasury stock at cost, 8,062 and 7,688 shares, respectively	(76,473)	(71,793)
Accumulated deficit	(23,160)	(27,089)
Accumulated other comprehensive loss	(180)	(705)
Total stockholders’ equity	202,059	198,368
Total liabilities and stockholders’ equity	$ 226,540	$ 224,176