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Note 3 - Supplemental Balance Sheet Information Allowance for Doubtful Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, at beginning of year	$ 3,441	$ 2,953	$ 3,077
Charged to expense	21,911us-gaap_ProvisionForDoubtfulAccounts	1,043us-gaap_ProvisionForDoubtfulAccounts	428us-gaap_ProvisionForDoubtfulAccounts
Write-offs and adjustments	(6,045)	(555)	(552)
Balance, at beginning of year	19,307	3,441	2,953
Bad debt expense as part of restructuring plan	$ 11,900us-gaap_OtherRestructuringCosts

- Definition

Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

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