XML 123 R103.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 20 - Subsequent Events (Details Textual) - USD ($)
2 Months Ended 3 Months Ended
Apr. 18, 2018
Mar. 30, 2018
Feb. 15, 2018
Apr. 11, 2018
Apr. 18, 2018
Mar. 28, 2018
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Jan. 31, 2015
Cash and Cash Equivalents, at Carrying Value, Ending Balance             $ 38,628,000 $ 64,425,000 $ 63,790,000 $ 83,502,000
Non-US [Member]                    
Cash and Cash Equivalents, at Carrying Value, Ending Balance             $ 34,400,000      
Z-Wave [Member]                    
Disposal Group, Including Discontinued Operation, Consideration $ 240,000,000       $ 240,000,000          
Subsequent Event [Member]                    
Foreign Earnings Repatriated         $ 22,800,000          
Subsequent Event [Member] | TSMC [Member]                    
Deposit on Orders for the Manufacture of Chipsets, Percentage       60.00%            
Subsequent Event [Member] | Sigma Designs Israel S.D.I Ltd. [Member]                    
Disposal Group, Including Discontinued Operation, Consideration     $ 28,000,000              
Proceeds from Divestiture of Businesses     23,500,000              
Sale of Business, Deduction of Working Capital Fluctuations     300,000              
Sale of Business, Amount Held in Escrow     $ 4,200,000              
Subsequent Event [Member] | Multimedia Business [Member]                    
Proceeds from Divestiture of Businesses   $ 5,254,000                
Disposal Group, Including Discontinued Operation, Consideration before Closing Adjustment           $ 5,000,000        
Target Working Capital           $ 2,500,000        
Subsequent Event [Member] | Z-Wave [Member]                    
Proceeds from Divestiture of Businesses $ 240,000,000