Earnings per share (Table) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Earnings Per Share Abstract
Income (Loss) from Continuing Operations Attributable to Parent	$ (8,164)	$ 22,968	$ 16,230
Earnings (loss) from discontinued operations, net of income taxes	(360)	1,256	(10,934)
Earnings (loss) attributable to SunOpta Inc.	$ (8,524)	$ 24,224	$ 5,296
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Number of Shares Outstanding, Basic	66,288,147	65,897,969	65,644,372
Weighted Average Number of Shares Outstanding, Diluted	67,832,125	66,611,397	66,583,149
Earnings (loss) per share - basic
from continuing operations basic	$ (0.12)	$ 0.35	$ 0.25
from discontinued operations basic	$ (0.01)	$ 0.02	$ (0.17)
Earnings Per Share Total	$ (0.13)	$ 0.37	$ 0.08
Earnings (loss) per share - diluted
from continuing operations diluted	$ (0.12)	$ 0.34	$ 0.24
from discontinued operations diluted	$ (0.01)	$ 0.02	$ (0.16)
Earnings Per Share Diluted Total	$ (0.13)	$ 0.36	$ 0.08
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	2,045,200	1,355,700
Options Held [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive Securities, Effect on Basic Earnings Per Share, Including Options and Restrictive Stock Units	1,165,133	551,723	705,332
Warrant [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive Securities, Effect on Basic Earnings Per Share, Including Options and Restrictive Stock Units	378,845	161,705	233,445

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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