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Deposits and Other Current Assets
 3 Months Ended
Mar. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Deposits and Other Current Assets Deposits and Other Current Assets
Deposits and other current assets consist of the following:
Deposits:March 31, 2022December 31, 2021
Deposits for research and development, prototype parts, and other$47,259 $54,990 
Deposits for “Future Work”8,380 8,380 
Total deposits$55,639 $63,370 
Other current assets:
Prepaid expenses$6,010 $11,119 
Other current assets2,598 2,291 
Total other current assets $8,608 $13,410 
During the three months ended March 31, 2022, the Company made deposits for research and development (“R&D”), prototype parts, and other with its vendors, which support the Company’s ongoing R&D efforts and operations. The Company expenses deposits as the services are provided and prototype parts are received.
Amortization expense related to the Palantir hosting arrangement and other prepaid software subscriptions totaled $2,870 and $0 for the three months ended March 31, 2022 and 2021, respectively.