CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 80,702	$ 85,923
Short-term investments	163,983	158,018
Accounts receivable	14,451	8,657
Inventory	8,673	11,018
Other current assets	6,242	3,929
Total current assets	274,051	267,545
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $21,698 and $20,713	13,904	11,808
ACQUIRED TECHNOLOGY, net of accumulated amortization of $27,351 and $21,868	99,494	104,624
INVESTMENTS	5,781	1,270
OTHER ASSETS	275	277
TOTAL ASSETS	393,505	385,524
CURRENT LIABILITIES:
Accounts payable	10,555	7,596
Accrued expenses	7,406	10,394
Deferred revenue	4,189	4,273
Other current liabilities	940	36
Total current liabilities	23,090	22,299
DEFERRED REVENUE	2,778	3,153
RETIREMENT PLAN BENEFIT LIABILITY	10,332	9,837
Total liabilities	36,200	35,289
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, 46,608,503 and 46,561,437 shares issued at June 30, 2013 and December 31, 2012, respectively	466	465
Additional paid-in capital	566,409	564,883
Accumulated deficit	(193,587)	(204,211)
Accumulated other comprehensive loss	(5,327)	(5,702)
Treasury stock, at cost (401,501 and 205,902 shares at June 30, 2013 and December 31, 2012, respectively)	(10,658)	(5,202)
Total shareholders’ equity	357,305	350,235
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 393,505	$ 385,524