Capital assets (Tables)

12 Months Ended

May 31, 2019

Capital assets

Schedule of capital assets

			Production				Leasehold		Construction		Totalcapital
	Land		Facility		Equipment		improvements		inprocess		assets
Cost
At May 31, 2017	$	10,829	$	16,170	$	5,340	$	262	$	42,159	$	74,760
Business acquisitions		854		6,992		2,860		1,388		5,947		18,041
Additions		12,716		47,149		4,759		15		151,899		216,538
Transfers		105		29,338		2,990		—		(32,433)		—
Disposals		—		(207)		—		—		(415)		(622)
At May 31, 2018		24,504		99,442		15,949		1,665		167,157		308,717
Business acquisitions		345		4,524		1,662		182		154		6,867
Additions		8,109		3,829		28,305		778		163,953		204,974
Transfers		192		124,603		33,687		(1,389)		(157,093)		—
Effect of foreign exchange		3		70		24		—		11		108
At May 31, 2019	$	33,153	$	232,468	$	79,627	$	1,236	$	174,182	$	520,666
Accumulated depreciation
At May 31, 2017	$	—	$	983	$	1,260	$	62	$	—	$	2,305
Amortization		—		1,517		1,697		47		—		3,261
At May 31, 2018		—		2,500		2,957		109		—		5,566
Amortization		—		5,160		5,962		80		—		11,202
At May 31, 2019	$	—	$	7,660	$	8,919	$	189	$	—	$	16,768
Net book value
At May 31, 2017	$	10,829	$	15,187	$	4,080	$	200	$	42,159	$	72,455
At May 31, 2018	$	24,504	$	96,942	$	12,992	$	1,556	$	167,157	$	303,151
At May 31, 2019	$	33,153	$	224,808	$	70,708	$	1,047	$	174,182	$	503,898