CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 45,536	$ 85,923
Short-term investments	175,311	158,018
Accounts receivable	10,527	8,657
Inventory	9,082	11,018
Other current assets	7,632	3,929
Total current assets	248,088	267,545
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $21,222 and $20,713	12,512	11,808
ACQUIRED TECHNOLOGY, net of accumulated amortization of $24,610 and $21,868	102,196	104,624
INVESTMENTS	4,868	1,270
OTHER ASSETS	259	277
TOTAL ASSETS	367,923	385,524
CURRENT LIABILITIES:
Accounts payable	5,622	7,596
Accrued expenses	5,706	10,394
Deferred revenue	3,826	4,273
Other current liabilities	35	36
Total current liabilities	15,189	22,299
DEFERRED REVENUE	2,966	3,153
RETIREMENT PLAN BENEFIT LIABILITY	10,084	9,837
Total liabilities	28,239	35,289
Commitments and Contingencies
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, 46,587,199 and 46,561,437 shares issued at March 31, 2013 and December 31, 2012, respectively	466	465
Additional paid-in capital	564,379	564,883
Accumulated deficit	(208,969)	(204,211)
Accumulated other comprehensive loss	(5,536)	(5,702)
Treasury stock, at cost (401,501 and 205,902 shares at March 31, 2013 and December 31, 2012, respectively)	(10,658)	(5,202)
Total shareholders’ equity	339,684	350,235
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 367,923	$ 385,524