Annual report pursuant to Section 13 and 15(d)

Note 3 - Consolidated Financial Statement Details (Details Textual)

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Note 3 - Consolidated Financial Statement Details (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 03, 2016
Jun. 24, 2016
Jan. 01, 2017
Jan. 03, 2016
Dec. 28, 2014
Restricted Cash, Contractual Term     1 year    
Inventory Write-down     $ 442 $ 673  
Accumulated Depreciation, Depletion and Amortization, Sale or Disposal of Property, Plant and Equipment     2,118    
Depreciation     4,110 3,967 $ 3,997
Sale Leaseback Transaction, Net Proceeds, Financing Activities     509
Long-lived Assets Evaluated for Impairment     2,339    
Impairment of Long-Lived Assets Held-for-use     0    
Equipment Sale Back [Member]          
Sale Leaseback Transaction, Net Proceeds, Financing Activities $ 509        
Lessee Leasing Arrangements, Operating Leases, Term of Contract   2 years 330 days      
Sale Leaseback Transaction, Monthly Rental Payments   $ 15      
Sale Leaseback Transaction, Net Book Value 487        
Sale Leaseback Transaction, Amount Due under Financing Arrangement $ 492        
Machinery and Equipment [Member]          
Capital Leased Assets, Gross     2,193 2,528  
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation     673 865  
Machinery and Equipment [Member] | Assets Under Capital Lease [Member]          
Depreciation     311 417 694
Computer Equipment [Member]          
Capital Leased Assets, Gross     83 119  
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation     80 86  
Computer Equipment [Member] | Assets Under Capital Lease [Member]          
Depreciation     $ 29 $ 49 $ 151