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Note 12 - Revenue by Product Group, by Significant Customer and by Geographic Location; Geographic Information - Product Revenue by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue	$ 29,772	$ 29,697	$ 30,418	$ 24,723	$ 26,956	$ 26,787	$ 30,548	$ 21,264	$ 114,610	$ 105,555	$ 113,420
Orthobiologics [Member]
Revenue									$ 101,002	$ 93,556	$ 93,816
Percentage of Product Revenue									88.00%	89.00%	87.00%
Surgical [Member]
Revenue									$ 5,183	$ 5,514	$ 5,262
Percentage of Product Revenue									5.00%	5.00%	5.00%
Dermal [Member]
Revenue									$ 2,244	$ 396	$ 2,755
Percentage of Product Revenue									2.00%	0.00%	3.00%
Manufactured Product, Other [Member]
Revenue									$ 6,083	$ 6,065	$ 5,950
Percentage of Product Revenue									5.00%	6.00%	5.00%
Product [Member]
Revenue	$ 29,767	$ 29,615	$ 30,413	$ 24,717	$ 26,950	$ 26,781	$ 30,542	$ 21,258	$ 114,512	$ 105,531	$ 107,783
Percentage of Product Revenue									100.00%	100.00%	100.00%

X

- Definition

Represents the percentage of revenue from contract with customer.

+ References

No definition available.

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X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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- Details

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- Details

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Period Type:

X

- Details

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