CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 109,251	$ 45,418
Short-term investments	246,986	243,088
Accounts receivable	17,378	22,075
Inventory	16,969	37,109
Deferred income taxes	14,863	18,459
Other current assets	4,773	4,356
Total current assets	410,220	370,505
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $26,250 and $24,813	20,905	19,922
ACQUIRED TECHNOLOGY, net of accumulated amortization of $49,338 and $43,838	77,514	83,014
INVESTMENTS	3,888	3,047
DEFERRED INCOME TAXES	12,299	12,934
OTHER ASSETS	345	425
TOTAL ASSETS	525,171	489,847
CURRENT LIABILITIES:
Accounts payable	6,656	9,260
Accrued expenses	16,424	14,986
Deferred revenue	22,020	2,466
Other current liabilities	53	111
Total current liabilities	45,153	26,823
DEFERRED REVENUE	27,331	3,366
RETIREMENT PLAN BENEFIT LIABILITY	11,750	10,916
Total liabilities	84,234	$ 41,105
COMMITMENTS AND CONTINGENCIES (Note 13)
SHAREHOLDERS' EQUITY:
Preferred Stock, par value $0.01 per share, 5,000,000 shares authorized, 200,000 shares of Series A Nonconvertible Preferred Stock issued and outstanding (liquidation value of $7.50 per share or $1,500)	2	$ 2
Common Stock, par value $0.01 per share, 100,000,000 shares authorized, 47,457,719 and 47,061,826 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively	475	471
Additional paid-in capital	583,338	581,114
Accumulated deficit	(98,762)	(88,305)
Accumulated other comprehensive loss	(3,958)	(4,382)
Treasury stock, at cost (1,357,863 shares at June 30, 2015 and December 31, 2014)	(40,158)	(40,158)
Total shareholders’ equity	440,937	448,742
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 525,171	$ 489,847