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
Apr. 02, 2017
Apr. 03, 2016
Jan. 01, 2017
Inventory Valuation Reserves $ 370   $ 442
Depreciation 979 $ 1,000  
Long-lived Assets Evaluated for Impairment 2,240    
Long-lived Assets, Amount in Excess of Carrying Value 928    
Impairment of Long-Lived Assets Held-for-use 0    
Long-lived Assets, Fair Value Assumption, Revenue Projection Lower by 1%, Recoverable Amount 683    
Machinery and Equipment [Member]      
Capital Leased Assets, Gross 2,193   2,193
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 751   673
Machinery and Equipment [Member] | Assets Under Capital Lease [Member]      
Depreciation 78 80  
Computer Equipment [Member]      
Capital Leased Assets, Gross 83   83
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 83   $ 80
Computer Equipment [Member] | Assets Under Capital Lease [Member]      
Depreciation $ 3 $ 10