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Accrued Expenses and Other Current Liabilities (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Disclosure Text Block Supplement [Abstract]    
Schedule of accrued expenses and other current liabilities
   As of 
  

June 30,

2021

  

December 31,

2020

 
Accrued warranty costs  $1,657   $1,735 
Accrued compensation and related benefits   2,533    1,001 
Contingent purchase price consideration - Quantum   1,873    926 
Deferred purchase price consideration – World Energy   1,680    
-
 
Accreted contingent compensation to sellers of World Energy   427    
-
 
Accrued financing fees   
-
    723 
Accrued expenses, other   2,749    216 
   $10,919   $4,601 
   2020   2019 
Accrued warranty costs  $1,735   $1,009 
Accrued compensation and related benefits   1,001    398 
Contingent and deferred purchase consideration connection with Quantum acquisition   926    638 
Accrued financing fees   723    360 
Accrued expenses, other   216    553 
Sales tax   -    96 
   $4,601   $3,054