CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 74,193	$ 111,795
Short-term investments	164,585	234,294
Accounts receivable	7,871	10,727
Inventory	9,451	3,843
Other current assets	4,390	1,645
Total current assets	260,490	362,304
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $20,184 and $18,735	11,713	10,884
ACQUIRED TECHNOLOGY, net of accumulated amortization of $19,126 and $17,000	107,367	391
INVESTMENTS	1,169
OTHER ASSETS	262	299
TOTAL ASSETS	381,001	373,878
CURRENT LIABILITIES:
Accounts payable	5,451	4,776
Accrued expenses	9,179	9,020
Deferred revenue	5,001	5,534
Other current liabilities	478	187
Total current liabilities	20,109	19,517
DEFERRED REVENUE	3,349	3,874
RETIREMENT PLAN BENEFIT LIABILITY	8,685	8,260
Total liabilities	32,143	31,651
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, 46,537,754 and 46,113,296 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively	465	461
Additional paid-in capital	563,383	561,492
Accumulated deficit	(209,596)	(213,871)
Accumulated other comprehensive income (loss)	(5,396)	(5,857)
Total shareholders' equity	348,858	342,227
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 381,001	$ 373,878