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Consolidated Statements Of Shareholders' Equity - USD ($) | On-X [Member] Common Stock [Member] | On-X [Member] Additional Paid In Capital [Member] | On-X [Member] Retained Earnings [Member] | On-X [Member] Accumulated Other Comprehensive Income (Loss) [Member] | On-X [Member] Treasury Stock [Member] | On-X [Member] | JOTEC [Member] Common Stock [Member] | JOTEC [Member] Additional Paid In Capital [Member] | JOTEC [Member] Retained Earnings [Member] | JOTEC [Member] Accumulated Other Comprehensive Income (Loss) [Member] | JOTEC [Member] Treasury Stock [Member] | JOTEC [Member] | Common Stock [Member] | Additional Paid In Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Treasury Stock [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  | $ 298,000 | $ 142,888,000 | $ 23,365,000 | $ (76,000) | $ (11,224,000) | $ 155,251,000
Balance, shares at Dec. 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  | 29,766,000 |  |  |  | (1,265,000) |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,778,000 |  |  | 10,778,000
Foreign currency translation gain (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (353,000) |  | (353,000)
Comprehensive (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,425,000
Equity compensation |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000 | 6,599,000 |  |  |  | 6,602,000
Equity compensation, shares |  |  |  |  |  |  |  |  |  |  |  |  | 342,000 |  |  |  |  |
Exercise of options |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000 | 2,083,000 |  |  | $ (712,000) | 1,374,000
Exercise of options, shares |  |  |  |  |  |  |  |  |  |  |  |  | 372,000 |  |  |  | (69,000) |
Employee stock purchase plan |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 | 828,000 |  |  |  | $ 829,000
Employee stock purchase plan, shares |  |  |  |  |  |  |  |  |  |  |  |  | 90,000 |  |  |  |  | 90,000
Excess tax benefit/shortfall |  |  |  |  |  |  |  |  |  |  |  |  |  | 606,000 |  |  |  | $ 606,000
Redemption and repurchase of stock to cover tax withholdings |  |  |  |  |  |  |  |  |  |  |  |  |  | (499,000) |  |  | $ (198,000) | (697,000)
Redemption and repurchase of stock to cover tax withholdings, shares |  |  |  |  |  |  |  |  |  |  |  |  | (44,000) |  |  |  | (22,000) |
Stock issued during period, Acquisition | $ 37,000 | $ 34,556,000 |  |  |  | $ 34,593,000 |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, Shares, Acquisition | 3,704,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  | $ 342,000 | 187,061,000 | 34,143,000 | (429,000) | $ (12,134,000) | 208,983,000
Balance, shares at Dec. 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  | 34,230,000 |  |  |  | (1,356,000) |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,704,000 |  |  | 3,704,000
Foreign currency translation gain (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,286,000 |  | 2,286,000
Comprehensive (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,990,000
Equity compensation |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000 | 7,310,000 |  |  |  | 7,313,000
Equity compensation, shares |  |  |  |  |  |  |  |  |  |  |  |  | 311,000 |  |  |  |  |
Exercise of options |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,000 | 2,476,000 |  |  | $ (585,000) | 1,895,000
Exercise of options, shares |  |  |  |  |  |  |  |  |  |  |  |  | 393,000 |  |  |  | (30,000) |
Employee stock purchase plan |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 | 1,230,000 |  |  |  | $ 1,231,000
Employee stock purchase plan, shares |  |  |  |  |  |  |  |  |  |  |  |  | 93,000 |  |  |  |  | 93,000
Redemption and repurchase of stock to cover tax withholdings |  |  |  |  |  |  |  |  |  |  |  |  | $ (1,000) | (1,613,000) |  |  |  | $ (1,614,000)
Redemption and repurchase of stock to cover tax withholdings, shares |  |  |  |  |  |  |  |  |  |  |  |  | (92,000) |  |  |  |  |
Stock issued during period, Acquisition |  |  |  |  |  |  | $ 27,000 | $ 53,092,000 |  |  |  | $ 53,119,000 |  |  |  |  |  |
Stock issued during period, Shares, Acquisition |  |  |  |  |  |  | 2,683,000 |  |  |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  | $ 376,000 | 249,935,000 | 37,609,000 | 1,857,000 | $ (12,719,000) | 277,058,000
Balance, shares at Dec. 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  | 37,618,000 |  |  |  | (1,386,000) |
Cumulative effect of adjustment | ASU 2016-09 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  | 379,000 | (238,000) |  |  | 141,000
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,840,000) |  |  | (2,840,000)
Foreign currency translation gain (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,929,000) |  | (7,929,000)
Comprehensive (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,769,000)
Equity compensation |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000 | 6,806,000 |  |  |  | 6,809,000
Equity compensation, shares |  |  |  |  |  |  |  |  |  |  |  |  | 287,000 |  |  |  |  |
Exercise of options |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000 | 4,382,000 |  |  | $ (1,872,000) | 2,515,000
Exercise of options, shares |  |  |  |  |  |  |  |  |  |  |  |  | 578,000 |  |  |  | (98,000) |
Employee stock purchase plan |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 | 1,338,000 |  |  |  | $ 1,339,000
Employee stock purchase plan, shares |  |  |  |  |  |  |  |  |  |  |  |  | 83,000 |  |  |  |  | 83,000
Redemption and repurchase of stock to cover tax withholdings |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,100,000) |  |  |  | $ (2,100,000)
Redemption and repurchase of stock to cover tax withholdings, shares |  |  |  |  |  |  |  |  |  |  |  |  | (103,000) |  |  |  |  |
Balance at Dec. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  | $ 385,000 | 260,361,000 | 34,984,000 | (6,072,000) | $ (14,591,000) | 275,067,000
Balance, shares at Dec. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  | 38,463,000 |  |  |  | (1,484,000) |
Cumulative effect of adjustment | ASU 2016-09 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  | 379,000 | (238,000) |  |  |
Cumulative effect of adjustment | ASU 606 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 215,000 |  |  | $ 215,000

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