Acquisitions (Details) - USD ($) $ in Thousands	6 Months Ended
	May 31, 2020	Nov. 30, 2019	May 31, 2019
Assets acquired
Goodwill	$ 200,515		$ 347,666
Eximo Medical, Ltd.
Assets acquired
Accounts receivable	50	$ 50
Inventory	150	150
Prepaid expenses and other current assets	54	54
Long-term deposits	51	51
Property, plant and equipment	397	397
Goodwill	11,427	12,428
Goodwill, adjustments	(1,001)
Total assets acquired	72,429	72,130
Total assets acquired, adjustments	299
Liabilities assumed
Accounts payable	84	84
Other current liabilities	615	615
Deferred tax liabilities	11,070	10,771
Deferred tax liabilities, adjustments	299
Total liabilities assumed	11,769	11,470
Total liabilities assumed, adjustments	299
Net assets acquired	60,660	60,660
Net assets acquired, adjustments	0
Eximo Medical, Ltd. | Product technology
Assets acquired
Intangible assets	60,300	$ 59,000
Intangible assets, adjustments	$ 1,300
RadiaDyne
Assets acquired
Accounts receivable			900
Inventory			732
Prepaid expenses and other current assets			98
Property, plant and equipment			133
Goodwill			47,982
Total assets acquired			75,445
Liabilities assumed
Accounts payable			352
Accrued expenses			106
Total liabilities assumed			458
Net assets acquired			74,987
RadiaDyne | RadiaDyne trademark
Assets acquired
Intangible assets			400
RadiaDyne | OarTrac trademark
Assets acquired
Intangible assets			200
RadiaDyne | RadiaDyne legacy product technology
Assets acquired
Intangible assets			1,500
RadiaDyne | OarTrac product technology
Assets acquired
Intangible assets			18,900
RadiaDyne | Customer relationships
Assets acquired
Intangible assets			4,600
BioSentry
Assets acquired
Inventory			50
Property, plant and equipment			10
Goodwill			13,740
Liabilities assumed
Net assets acquired			39,800
BioSentry | Trademarks
Assets acquired
Intangible assets			2,500
BioSentry | Product technology
Assets acquired
Intangible assets			20,900
BioSentry | Customer relationships
Assets acquired
Intangible assets			$ 2,600