Sale of Soy and Corn Business (Details) - Sunopta Grains And Foods Inc [Member] - Disposal Group, Not Discontinued Operations [Member] $ in Thousands	3 Months Ended
Mar. 30, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration	$ 66,500
Transaction and related costs	(1,624)
Net proceeds	64,876
Current assets	22,810
Property, plant and equipment	8,423
Goodwill	1,526
Current liabilities	(13,462)
Net assets sold	19,297
Pre-tax gain on sale	$ 45,579

Amount of net assets sold attributable to disposal group.

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Amount classified as net proceeds attributable to disposal group.

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Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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