Business combinations and investments - Variable interest entity's assets and liabilities (Details) - USD ($) $ in Thousands	Oct. 02, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 80,917	$ 86,839
Property and equipment, net	10,297	6,879
Intangible assets, net	248,794	191,650
Operating lease assets	16,938	14,961
Total assets	654,790	494,466
Other current liabilities	2,993	3,926
Other long-term liabilities	22,558	21,728
Total liabilities	$ 424,293	350,306
Variable Interest Entity, Primary Beneficiary | Harbor Medtech Inc
Variable Interest Entity [Line Items]
Cash and cash equivalents		803
Property and equipment, net		173
Intangible assets, net		5,635
Operating lease assets		178
Other assets		74
Total assets		6,863
Accounts payable and accrued liabilities		366
Other current liabilities		2,004
Other long-term liabilities		659
Total liabilities		$ 3,029