Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 11,359	$ 21,324
Restricted deposits	503	524
Marketable securities and short-term deposits	34,410	24,697
Trade receivables	21,448	13,416
Other accounts receivable and prepaid expenses	2,843	3,167
Inventories	8,247	9,422
TOTAL CURRENT ASSETS	78,810	72,550
PROPERTY AND EQUIPMENT, NET	2,854	3,184
NON-CURRENT ASSETS:
Long-term marketable securities and deposits	73,398	82,669
Long-term prepaid expenses and lease deposits	1,642	1,541
Deferred income taxes	855	1,043
Severance pay fund	14,755	15,190
Intangible assets, net	1,503	2,779
Goodwill	6,243	6,243
TOTAL NON-CURRENT ASSETS	98,396	109,465
TOTAL ASSETS	180,060	185,199
CURRENT LIABILITIES:
Trade payables	9,393	8,660
Accrued compensation and benefits	7,702	8,699
Income tax accruals and payables	857	1,232
Accrued expenses and other accounts payable	3,783	2,888
TOTAL CURRENT LIABILITIES	21,735	21,479
NON-CURRENT LIABILITIES:
Deferred income taxes	146	424
Accrued severance pay	14,944	15,463
Accrued pensions	868	883
TOTAL NON-CURRENT LIABILITIES	15,958	16,770
Equity
Common stock, $ 0.001 par value - Authorized shares: 50,000,000 shares at September 30, 2018 and December 31, 2017; Issued and outstanding shares: 22,332,016 and 22,432,660 shares at September 30, 2018 and December 31, 2017, respectively	22	22
Additional paid-in capital	377,162	372,041
Treasury stock at cost	(121,286)	(118,397)
Accumulated other comprehensive loss	(2,658)	(1,874)
Accumulated deficit	(110,873)	(104,842)
TOTAL STOCKHOLDERS’ EQUITY	142,367	146,950
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 180,060	$ 185,199