Statements of Financial Position Consolidated Balance Sheet - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Cash and Cash Equivalents, at Carrying Value	$ 66,439	$ 44,554
Marketable Securities, Current	96,661	116,924
Accounts Receivable, Net, Current	64,576	55,492
Inventory, Net	70,561	71,490
Prepaid Expense and Other Assets	22,426	8,137
Assets, Current	320,663	296,597
Property, Plant and Equipment, Net	13,513	12,346
Goodwill	22,495	22,495
Intangible Assets, Net (Excluding Goodwill)	11,403	12,593
Other Assets, Noncurrent	35,641	35,532
Assets	403,715	379,563
Liabilities, Current [Abstract]
Accounts Payable and Accrued Liabilities	20,613	21,466
Taxes Payable, Current	7,157	1,163
Deferred Revenue, Current	8,258	6,441
Convertible Debt, Current	59,885	57,846
Other Liabilities, Current	10,634	12,415
Liabilities, Current	106,547	99,331
Other Liabilities, Noncurrent	10,388	9,554
Liabilities	116,935	108,885
Commitments and Contingencies
Stockholders' Equity Attributable to Parent [Abstract]
Common Stock, Value, Issued	31	31
Additional Paid in Capital, Common Stock	388,233	394,928
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,366)	(2,623)
Retained Earnings (Accumulated Deficit)	(100,118)	(121,658)
Stockholders' Equity Attributable to Parent	286,780	270,678
Liabilities and Equity	$ 403,715	$ 379,563

Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.

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- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.