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Note 2 - Summary of Significant Accounting Policies - Summary of Product Sales Allowance (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Balance	$ 342
Provision	19,252
Payments/credits	(10,275)
Balance	9,319
Allowance for Sales Returns [Member]
Balance	49
Provision	473
Payments/credits	(1)
Balance	521
Allowance for Distributor Fees [Member]
Balance	72
Provision	2,027
Payments/credits	(1,519)
Balance	580
Allowance for Rebates and Chargebacks [Member]
Balance	221
Provision	16,752
Payments/credits	(8,755)
Balance	$ 8,218

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.

+ Details

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X

- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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