Statements of Financial Position Consolidated Balance Sheet - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Cash and Cash Equivalents, at Carrying Value	$ 57,705	$ 37,859
Available-for-sale Securities, Debt Securities, Current	91,244	87,872
Accounts Receivable, Net, Current	70,564	64,912
Inventory, Net	66,835	65,485
Income Taxes Receivable	0	2,389
Prepaid Expense and Other Assets, Current	4,634	4,113
Assets, Current	290,982	262,630
Property, Plant and Equipment, Net	15,091	11,858
Goodwill	22,495	22,495
Intangible Assets, Net (Excluding Goodwill)	9,263	10,273
Other Assets, Noncurrent	32,755	31,443
Assets	370,586	338,699
Liabilities, Current [Abstract]
Accounts Payable and Accrued Liabilities, Current	25,928	21,494
Accrued Income Taxes, Current	1,168	0
Deferred Revenue, Current	11,230	7,329
Other Liabilities, Current	7,722	7,139
Liabilities, Current	46,048	35,962
Other Liabilities, Noncurrent	11,247	9,002
Liabilities	57,295	44,964
Commitments and Contingencies
Stockholders' Equity Attributable to Parent [Abstract]
Common Stock, Value, Issued	32	31
Additional Paid in Capital, Common Stock	383,174	381,189
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,481)	(2,779)
Retained Earnings (Accumulated Deficit)	(68,434)	(84,706)
Stockholders' Equity Attributable to Parent	313,291	293,735
Liabilities and Equity	$ 370,586	$ 338,699

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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.