Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Note 4 - Interim Consolidated Financial Statement Details (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 01, 2017
Oct. 02, 2016
Oct. 01, 2017
Oct. 02, 2016
Jan. 01, 2017
Inventory Valuation Reserves $ 827   $ 827   $ 442
Depreciation     2,789 $ 3,066  
Impairment of Long-Lived Assets Held-for-use 1,601  
Property, Plant and Equipment, Net 10,962   10,962   14,437
Accumulated Depreciation, Depletion and Amortization, Sale or Disposal of Property, Plant and Equipment     870    
UNITED STATES          
Impairment of Long-Lived Assets Held-for-use     1,025    
Long-lived Assets, Fair Value Assumption, Revenue Projection Decreased by One Percent, Recoverable Amount 110   110    
Machinery and Equipment [Member]          
Capital Leased Assets, Gross 533   533   2,193
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 207   207   $ 673
Impairment of Long-Lived Assets Held-for-use     576    
Property, Plant and Equipment, Transfers and Changes 0        
Machinery and Equipment [Member] | Corporate Segment [Member]          
Property, Plant and Equipment, Net 130   130    
Machinery and Equipment [Member] | UNITED STATES          
Impairment of Long-Lived Assets Held-for-use 0        
Property, Plant and Equipment, Net 1,255   1,255    
Long-lived Assets, Fair Value Assumption, Effect of One Percent Increase in WACC on Impairment 37   37    
Machinery and Equipment [Member] | CHINA          
Impairment of Long-Lived Assets Held-for-use 0        
Long-lived Assets, Fair Value Assumption, Revenue Projection Decreased by One Percent, Recoverable Amount 641   641    
Long-lived Assets Evaluated for Impairment 1,510   1,510    
Long-lived Assets, Amount in Excess of Carrying Value 1,122   1,122    
Machinery and Equipment [Member] | CHINA | Impaired Assets Group 1 [Member]          
Property, Plant and Equipment, Net 446   446    
Machinery and Equipment [Member] | Assets Under Capital Lease [Member]          
Depreciation $ 15 $ 78 148 $ 233  
Impairment of Long-Lived Assets Held-for-use     $ 97