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Contract Assets and Liabilities (Tables)
 12 Months Ended
Dec. 28, 2019
Contract Assets and Liabilities [Abstract]  
Contract with Customer, Asset and Liability [Table Text Block]
Net contract assets (liabilities) consisted of the following:
 
December 28, 2019
 
December 29, 2018
 
$ Change
 
% Change
Contract assets and unbilled receivables
$
921,082

 
$
3,089,663

 
$
(2,168,581
)
 
(70
)%
Contract liabilities and billings in excess of revenue earned
(796,794
)
 
(388,933
)
 
(407,861
)
 
105
 %
Contract liabilities, noncurrent
(6,557
)
 
(17,294
)
 
10,737

 
(62
)%
Net contract assets
$
117,731

 
$
2,683,436

 
$
(2,565,705
)
 
(96
)%