CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 70,586	$ 85,923
Short-term investments	202,024	158,018
Accounts receivable	15,657	8,657
Inventory	10,595	11,018
Deferred income taxes	21,563	11
Other current assets	6,623	3,918
Total current assets	327,048	267,545
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $22,756 and $20,713	14,893	11,808
ACQUIRED TECHNOLOGY, net of accumulated amortization of $32,841 and $21,868	94,011	104,624
INVESTMENTS	7,417	1,270
DEFERRED INCOME TAXES	19,143	0
OTHER ASSETS	242	277
TOTAL ASSETS	462,754	385,524
CURRENT LIABILITIES:
Accounts payable	5,256	7,596
Accrued expenses	16,039	10,394
Deferred revenue	1,910	4,273
Other current liabilities	24	36
Total current liabilities	23,229	22,299
DEFERRED REVENUE	2,403	3,153
RETIREMENT PLAN BENEFIT LIABILITY	9,436	9,837
Total liabilities	35,068	35,289
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, 46,825,168 and 46,561,437 shares issued at December 31, 2013 and 2012, respectively	468	465
Additional paid-in capital	572,401	564,883
Accumulated deficit	(130,159)	(204,211)
Accumulated other comprehensive loss	(4,368)	(5,702)
Treasury stock, at cost (401,501 and 205,902 shares at December 31, 2013 and 2012, respectively)	(10,658)	(5,202)
Total shareholders’ equity	427,686	350,235
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 462,754	$ 385,524