CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 89,956	$ 45,418
Short-term investments	271,593	243,088
Accounts receivable	28,350	22,075
Inventory	13,688	37,109
Deferred income taxes	15,785	18,459
Other current assets	4,523	4,356
Total current assets	423,895	370,505
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $27,036 and $24,813	21,490	19,922
ACQUIRED TECHNOLOGY, net of accumulated amortization of $52,087 and $43,838	74,765	83,014
INVESTMENTS	3,024	3,047
DEFERRED INCOME TAXES	10,917	12,934
OTHER ASSETS	232	425
TOTAL ASSETS	534,323	489,847
CURRENT LIABILITIES:
Accounts payable	10,334	9,260
Accrued expenses	12,979	14,986
Deferred revenue	20,830	2,466
Other current liabilities	104	111
Total current liabilities	44,247	26,823
DEFERRED REVENUE	26,382	3,366
RETIREMENT PLAN BENEFIT LIABILITY	12,235	10,916
Total liabilities	$ 82,864	$ 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, 47,494,938 and 47,061,826 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	475	471
Additional paid-in capital	586,533	581,114
Accumulated deficit	(91,715)	(88,305)
Accumulated other comprehensive loss	(3,678)	(4,382)
Treasury stock, at cost (1,357,863 shares at September 30, 2015 and December 31, 2014)	(40,158)	(40,158)
Total shareholders’ equity	451,459	448,742
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 534,323	$ 489,847