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Note 5 - Revenue Recognition - Reconciliation of Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Inventory	$ 19,418		$ 10,108
Other accrued liabilities	20,643		17,175
Deferred revenue			2,763
Retained earnings	$ (834,147)		$ (783,455)
Pro Forma [Member]
Inventory		$ 9,910
Other accrued liabilities		18,167
Deferred revenue
Retained earnings		(781,882)
Pro Forma [Member] | Accounting Standards Update 2014-09 [Member]
Inventory		(198)
Other accrued liabilities		992
Deferred revenue		(2,763)
Retained earnings		$ 1,573

X

- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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