Statement of Financial Position (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Cash and Cash Equivalents, at Carrying Value	$ 80,790	$ 104,253
Marketable Securities, Current	86,582	64,963
Accounts Receivable, less allowance of $606 in 2012 and $1,152 in 2013	53,437	57,113
Inventory, Net	61,351	57,948
Income Taxes Receivable	2,832	0
Prepaid Expense and Other Assets	3,186	4,301
Assets, Current	288,178	288,578
Property, Plant and Equipment, Net	13,058	11,909
Goodwill	22,553	15,361
Intangible Assets, Net (Excluding Goodwill)	11,464	12,358
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	34,332	34,284
Other Assets, Noncurrent	1,777	2,094
Assets	371,362	364,584
Accounts Payable, Current	3,095	3,932
Employee-related Liabilities, Current	7,457	8,975
Accrued Royalties	669	765
Product Warranty Accrual, Current	1,551	2,024
Taxes Payable, Current	0	1,823
Deferred Revenue	8,786	11,170
Other Liabilities, Current	10,132	8,359
Liabilities, Current	31,690	37,048
Convertible Debt, Noncurrent	51,751	49,010
Other Liabilities, Noncurrent	8,918	8,037
Liabilities	92,359	94,095
Preferred stock issued and outstanding	0	0
Common Stock, Value, Issued	33	32
Additional Paid in Capital, Common Stock	415,739	409,974
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,795)	(1,085)
Retained Earnings (Accumulated Deficit)	(134,974)	(138,432)
Stockholders' Equity Attributable to Parent	279,003	270,489
Liabilities and Equity	$ 371,362	$ 364,584