Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.22.1
Summary of Significant Accounting Policies (Narrative) (Details)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 28, 2022
USD ($)
item
$ / shares
Sep. 15, 2021
USD ($)
Mar. 31, 2022
$ / shares
shares
Summary of Significant Accounting Policies [Line Items]      
Number of board of director members | item 7    
Value of the investment in short-term money market funds sought to be preserved (in dollars per share) | $ / shares     $ 1.00
Selected by CSI [Member]      
Summary of Significant Accounting Policies [Line Items]      
Number of board of director members | item 2    
Selected by Pineapple Energy [Member]      
Summary of Significant Accounting Policies [Line Items]      
Number of board of director members | item 5    
Securities Purchase Agreement [Member]      
Summary of Significant Accounting Policies [Line Items]      
Private placement investment $ 32.0 $ 32.0  
Additional common shares available to purchase during warrant period $ 32.0    
Warrant Agreement [Member]      
Summary of Significant Accounting Policies [Line Items]      
Warrant term 5 years    
Term Loan from Hercules Capital, Inc. [Member]      
Summary of Significant Accounting Policies [Line Items]      
Repayments of debt $ 4.5    
Repayment of debt including interest 5.6    
Debt instrument, face amount $ 7.5    
Series A Preferred Stock [Member] | Securities Purchase Agreement [Member]      
Summary of Significant Accounting Policies [Line Items]      
Per share conversion price of preferred stock | $ / shares $ 13.60    
Convertible Shares and Warrants [Member]      
Summary of Significant Accounting Policies [Line Items]      
Shares not included in the computation of diluted earnings per share | shares     32,000
Convertible Shares [Member]      
Summary of Significant Accounting Policies [Line Items]      
Shares not included in the computation of diluted earnings per share | shares     32,000
Warrants [Member]      
Summary of Significant Accounting Policies [Line Items]      
Shares not included in the computation of diluted earnings per share | shares     2,353,936