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Acquisition Of JOTEC (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 01, 2017 | Oct. 10, 2017 | Dec. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |  |  |  |
Financing for business acquisition |  | $ 255,000 |  |  |  |  |
Term loan balance |  |  | $ 228,969 |  | $ 228,969 | $ 73,594 |
Cash consideration |  |  |  |  | 409 | 1,226 |
Transaction and integration costs |  |  | 7,400 |  | $ 7,400 |  |
JOTEC [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Agreement date |  |  |  |  | Oct. 10, 2017 |  |
Acquisition price |  | 225,000 |  |  |  |  |
Cash consideration | $ 168,800 |  |  |  |  |  |
Escrow deposit, part of payments to acquire business | $ 22,500 |  |  |  |  |  |
Purchase consideration, net of debt and cash acquired |  |  | 221,869 |  | $ 221,869 |  |
Transaction and integration costs |  |  | 8,900 |  | 8,900 |  |
Revenues |  |  | 4,100 |  |  |  |
Net loss |  |  | $ (1,500) |  | $ (736) | $ (1,966) |
Pro forma tax rate |  |  |  |  | 38.00% | 38.00% | 38.00%
Pro forma loss per common share - basic |  |  |  |  | $ (0.02) | $ (0.06) |
Pro forma amortization of intangible assets |  |  |  | $ 3,800 | $ 4,900 | $ 5,500 |
Pro forma loss per common share - diluted |  |  |  | $ 0.07 | $ (0.02) | $ (0.06) |
JOTEC [Member] | Clerical Error [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Pro forma amortization adjustment |  |  |  | $ 3,200 |  | $ 4,300 |
JOTEC [Member] | Common Stock [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Common shares issued | 2,682,754 |  |  |  |  |  |
Common stock value issued in business combination | $ 53,100 |  |  |  |  |  |
Scenario, Actual [Member] | JOTEC [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Pro forma loss per common share - basic |  |  |  | $ 0.13 |  | $ 0.02 |
Reclassification [Member] | JOTEC [Member] | Restatement Adjustment Pro Forma [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Pro forma loss per common share - basic |  |  |  | $ (0.06) |  | $ (0.08) |
Term Loan [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Term loan balance | 225,000 | 225,000 |  |  |  |  |
Senior Secured Credit Facility [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Credit facility aggregate commitments | 255,000 |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Credit facility aggregate commitments | $ 30,000 | $ 30,000 |  |  |  |  |

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