Annual report pursuant to Section 13 and 15(d)

Note 17 - Preferred Stock and Warrants - Preferred Stock Information (Details)

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Note 17 - Preferred Stock and Warrants - Preferred Stock Information (Details) - USD ($)
$ in Thousands
Mar. 28, 2020
Mar. 30, 2019
Jul. 08, 2013
Feb. 19, 2013
Nov. 10, 2011
Designated shares (in shares) 1,000,000 1,000,000      
Series B Preferred Stock [Member]          
Designated shares (in shares) 10,000 10,000      
Preferred Stock, Shares Issued, Total (in shares) 9,997 9,997     9,997
Preferred Stock, Shares Outstanding, Ending Balance (in shares) 9,245.13 9,997      
Preferred Stock, Liquidation Preference, Value $ 2,136 $ 2,309      
Series C Preferred Stock [Member]          
Designated shares (in shares) 3,500 3,500      
Preferred Stock, Shares Issued, Total (in shares) 3,424.65 3,424.65   3,424.65  
Preferred Stock, Shares Outstanding, Ending Balance (in shares) 3,424.65 3,424.65      
Preferred Stock, Liquidation Preference, Value $ 500 $ 500      
Series D Preferred Stock [Member]          
Designated shares (in shares) 6,000 6,000      
Preferred Stock, Shares Issued, Total (in shares) 5,111.86 5,111.86 5,111.86    
Preferred Stock, Shares Outstanding, Ending Balance (in shares) 5,111.86 5,111.86      
Preferred Stock, Liquidation Preference, Value $ 731 $ 731      
Series E Preferred Stock [Member]          
Designated shares (in shares) 100,000 100,000      
Preferred Stock, Shares Issued, Total (in shares) 100,000 100,000      
Preferred Stock, Shares Outstanding, Ending Balance (in shares) 9,200 98,400      
Preferred Stock, Liquidation Preference, Value $ 345 $ 3,690      
Series B, C, D, and E Preferred Stock [Member]          
Designated shares (in shares) 119,500 119,500      
Preferred Stock, Shares Issued, Total (in shares) 118,533.51 118,533.51      
Preferred Stock, Shares Outstanding, Ending Balance (in shares) 26,981.64 116,933.51      
Preferred Stock, Liquidation Preference, Value $ 3,712 $ 7,230