Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Revisions of Previously Issued Financial Statements (Details) - Impact on the Interim Consolidated Statements of Operations and Comprehensive Loss

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Note 2 - Revisions of Previously Issued Financial Statements (Details) - Impact on the Interim Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 28, 2015
Jun. 29, 2014
Jun. 28, 2015
Jun. 29, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Cost of sales $ 52,311 $ 52,151 $ 97,397 $ 105,463
Gross profit 5,430 5,833 9,058 10,544
Operating earnings 1,466 820 1,429 618
Net earnings (loss) and comprehensive income (loss) $ 969 $ 87 $ 545 $ (692) [1]
Basic and diluted earnings (loss) per share (in Dollars per share)   $ 0.01   $ (0.04)
Revaluation of Derivative Forward Contracts [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Cost of sales   $ (851) [2]   $ (1,094) [3]
Reduction to Amortization [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Cost of sales [2]       1,932
Scenario, Previously Reported [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Gross profit   5,779   10,164
Operating earnings   766   238
Net earnings (loss) and comprehensive income (loss)   $ 33   $ (1,072)
Basic and diluted earnings (loss) per share (in Dollars per share)   $ 0.01   $ (0.07)
Scenario, Previously Reported [Member] | Revaluation of Derivative Forward Contracts [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Cost of sales   $ (797) [2]   $ (889) [3]
Scenario, Previously Reported [Member] | Reduction to Amortization [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Cost of sales [2]       2,107
Restatement Adjustment [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Gross profit   54   380
Operating earnings   54   380
Net earnings (loss) and comprehensive income (loss)   54   380
Restatement Adjustment [Member] | Revaluation of Derivative Forward Contracts [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Cost of sales   $ (54) [2]   (205) [3]
Restatement Adjustment [Member] | Reduction to Amortization [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Cost of sales [2]       $ (175)
[1] Revised net loss and deficit to adjust for prior period errors. Refer to Note 2 for further details.
[2] Cost of sales has been reduced by $175 for the six months ended June 29, 2014 on the unaudited interim consolidated statement of operations and comprehensive loss related to a reduction to amortization of $175 due to an error. There was no impact on the three months ended June 29, 2014 as the error occurred in the three months ended March 30, 2014.
[3] Cost of sales has also been reduced by $54 and $205 for the three and six months ended June 29, 2014 respectively, related to the revaluation of the outstanding derivative forward contracts.