For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Sale Of Business Components (Narrative) (Details) - USD ($)			3 Months Ended	12 Months Ended
	Mar. 18, 2016	Feb. 03, 2016	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business					$ 740,000	$ 19,795,000
Payments to acquire distribution rights					$ 409,000	$ 1,226,000
Geographic Concentration Risk [Member] \| Long-Lived Assets [Member] \| Domestic [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Concentration percentage				57.00%	60.00%
HeRO Graft Product Line [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount of consideration received from sale of product line		$ 18,500,000
Proceeds from divestiture of business		17,800,000	$ 740,000
Pre-tax gain (loss) on sale business components		$ 8,800,000
ProCol [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business	$ 2,000,000
Pre-tax gain (loss) on sale business components	$ (845,000)
HeRO Graft And ProCol Product Lines [Member] \| Maximum [Member] \| Product Lines Concentration Risk [Member] \| Total Revenues [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Concentration percentage							10.00%