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Other Debt - SCHEDULE II - VALUATION and QUALIFYING ACCOUNTS (Tables)
 12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SCHEDULE II - VALUATION and QUALIFYING ACCOUNTS
SCHEDULE II – VALUATION and QUALIFYING ACCOUNTS
For the Fiscal Years of 2018, 2019 and 2020
ODYSSEY MARINE EXPLORATION, INC. AND SUBSIDIARIES
 
 
 
Balance at
Beginning
of Year
 
 
Charged
(Credited)
to Expenses
 
 
Charged
(Credited)
to Other
Accounts
 
 
Deductions
 
 
Balance at
End of
Year
 
Inventory reserve
 
   
 
   
 
   
 
   
 
   
2018
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
2019
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
2020
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
Accounts receivable reserve
 
   
 
   
 
   
 
   
 
   
2018
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
2019
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
2020
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—  
 
 
 
—