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Note 7 - Revenue Recognition - Summary of Product Sales Allowance (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Balance	$ 9,319
Provision	23,145
Payments/credits	(19,824)
Balance	12,640
Allowance for Sales Returns 1 [Member]
Balance	521
Provision	461
Payments/credits
Balance	982
Allowance for Distributor Fees [Member]
Balance	580
Provision	2,483
Payments/credits	(1,774)
Balance	1,289
Allowance for Rebates and Chargebacks [Member]
Balance	8,218
Provision	20,201
Payments/credits	(18,050)
Balance	$ 10,369

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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- 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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