Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Interim Consolidated Financial Statement Details (Details Textual)

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Note 4 - Interim Consolidated Financial Statement Details (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 27, 2015
Jun. 28, 2015
Sep. 28, 2014
Sep. 27, 2015
Sep. 28, 2014
Dec. 28, 2014
Assets Under Capital Lease [Member] | Leasehold Improvements [Member]            
Depreciation   $ 4 $ 2 $ 11  
Assets Under Capital Lease [Member] | Machinery and Equipment [Member]            
Depreciation $ 92   197 327 537  
Assets Under Capital Lease [Member] | Computer Equipment [Member]            
Depreciation $ 10   $ 35 $ 34 119  
Leasehold Improvements [Member]            
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation       $ 42
Capital Leased Assets, Gross       73
Machinery and Equipment [Member]            
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation $ 775     $ 775   916
Capital Leased Assets, Gross 2,528     2,528   3,495
Computer Equipment [Member]            
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 77     77   350
Capital Leased Assets, Gross $ 119     119   524
Depreciation       2,976 $ 2,960  
Accumulated Depreciation, Depletion and Amortization, Sale or Disposal of Property, Plant and Equipment   $ 6,522        
Inventory Write-down       $ 625   $ 475
Property, Plant and Equipment, Disposals   $ 6,522