Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 16,143	$ 21,324
Restricted deposits	506	524
Marketable securities and short-term deposits	30,684	24,697
Trade receivables	16,622	13,416
Other accounts receivable and prepaid expenses	3,196	3,167
Inventories	8,366	9,422
TOTAL CURRENT ASSETS	75,517	72,550
PROPERTY AND EQUIPMENT, NET	3,071	3,184
NON-CURRENT ASSETS:
Long-term marketable securities and deposits	76,620	82,669
Long-term prepaid expenses and lease deposits	1,598	1,541
Deferred income taxes	1,124	1,043
Severance pay fund	14,683	15,190
Intangible assets, net	1,929	2,779
Goodwill	6,243	6,243
TOTAL NON-CURRENT ASSETS	102,197	109,465
TOTAL ASSETS	180,785	185,199
CURRENT LIABILITIES:
Trade payables	9,851	8,660
Accrued compensation and benefits	7,986	8,699
Income tax accruals and payables	1,165	1,232
Accrued expenses and other accounts payable	2,746	2,888
TOTAL CURRENT LIABILITIES	21,748	21,479
NON-CURRENT LIABILITIES:
Deferred income taxes	239	424
Accrued severance pay	14,814	15,463
Accrued pensions	870	883
TOTAL NON-CURRENT LIABILITIES	15,923	16,770
Equity
Common stock, $ 0.001 par value - Authorized shares: 50,000,000 shares at June 30, 2018 and December 31, 2017; Issued and outstanding shares: 22,460,881 and 22,432,660 shares at June 30, 2018 and December 31, 2017, respectively	22	22
Additional paid-in capital	375,410	372,041
Treasury stock at cost	(119,200)	(118,397)
Accumulated other comprehensive loss	(2,698)	(1,874)
Accumulated deficit	(110,420)	(104,842)
TOTAL STOCKHOLDERS’ EQUITY	143,114	146,950
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 180,785	$ 185,199