Note 8 - Intangible Assets (Details) - Components of Intangible Assets (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 31, 2011	Dec. 29, 2012
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	$ 216	$ 210	$ 332
2014	79
2015	53
2016	39
2017	30
2018	15
Intangibles acquired		250
Amortization of intangibles	(116)	(128)
Restricted Covenants [Member] | Engineering [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	44
Restricted Covenants [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	44
Customer Relationship2 [Member] | Engineering [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	135
Customer Relationship2 [Member] | Information Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	37
Customer Relationship2 [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	172
Engineering [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	179		226
2014	47
2015	48
2016	39
2017	30
2018	15
Intangibles acquired		250
Amortization of intangibles	(47)	(24)
Information Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	37	210	106
2014	32
2015	5
Amortization of intangibles	$ (69)	$ (104)