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Note 5 - Revenue Recognition - Summary of Product Sales Allowance (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Balance	$ 9,319
Provision	66,523
Payments/credits	(50,339)
Balance	25,503
Allowance for Sales Returns 1 [Member]
Balance	521
Provision	464
Payments/credits	(38)
Balance	947
Allowance for Distributor Fees [Member]
Balance	580
Provision	7,555
Payments/credits	(5,322)
Balance	2,813
Allowance for Rebates and Chargebacks [Member]
Balance	8,218
Provision	58,504
Payments/credits	(44,979)
Balance	$ 21,743

X

- Definition

Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from provisions of amounts previously written off or reestablishment of reserves that had previously been utilized.

+ References

No definition available.

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X

- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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X

- Definition

Amount of decrease in valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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