Quarterly report pursuant to Section 13 or 15(d)

Note 16 - Subsequent Events (Details Textual)

v3.22.0.1
Note 16 - Subsequent Events (Details Textual) - USD ($)
3 Months Ended
Jan. 07, 2022
Dec. 27, 2021
Dec. 25, 2021
Jan. 06, 2022
Nov. 30, 2021
Nov. 12, 2021
Business Combination, Acquisition Related Costs     $ 402      
Affiliate of BitNile Borrowings [Member]            
Debt Instrument, Face Amount         $ 500,000  
Digital Power Lending [Member]            
Debt Instrument, Face Amount           $ 500,000
Long-term Debt, Total     500,000      
Subsequent Event [Member] | Digital Power Lending [Member]            
Proceeds from Issuance of Debt $ 300,000          
Long-term Debt, Total $ 800,000     $ 500,000    
Subsequent Event [Member] | Underwritten Public Offering [Member]            
Equity Offering, Maximum Offering Amount   $ 25,000,000        
Subsequent Event [Member] | Underwritten Public Offering [Member] | BitNile [Member]            
Equity Offering, Maximum Amount to be Purchased by Investor   $ 10,000,000        
Gresham Worldwide Inc [Member]            
Business Combination, Acquisition Related Costs     402,000      
Gresham Worldwide Inc [Member] | General and Administrative Expense [Member]            
Business Combination, Acquisition Related Costs     366,000      
Gresham Worldwide Inc [Member] | Cost of Sales [Member]            
Business Combination, Acquisition Related Costs     $ 36,000      
Gresham Worldwide Inc [Member] | Subsequent Event [Member]            
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)   3,960,043        
Business Acquisition, Oustanding Equity Awards Represented (in shares)   249,875        
Business Combination, Consideration Transferred, Liabilities Incurred   $ 4,250,000        
Business Combination, Potentially Issuable Shares (in shares)   100,000,000        
Business Combination, Termination Fee   $ 1,000,000.0        
Common Stock [Member] | Gresham Worldwide Inc [Member] | Subsequent Event [Member]            
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)   2,920,085        
Preferred Stock [Member] | Gresham Worldwide Inc [Member] | Subsequent Event [Member]            
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)   514.8