Quarterly report pursuant to Section 13 or 15(d)


6 Months Ended
Jun. 30, 2021
Revenue from Contract with Customer [Abstract]  
Revenue Recognition
Net sales include products and shipping and handling charges, net of estimates for customer allowances. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring products. All revenue is recognized when we satisfy our performance obligations under the contract. We recognize revenue by transferring the promised products to the customer, with the majority of revenue recognized at the point in time the customer obtains control of the products. We recognize revenue for shipping and handling charges at the time the products are delivered to or picked up by the customer. The majority of our contracts have a single performance obligation and are short term in nature.
Revenues related to repair and maintenance services are recognized over time as such services are provided. Payments for products, services, and merchandise are typically received at the point when control transfers to the customer or in accordance with payment terms customary to the business.
Accounts Receivable
Credit is extended based upon an evaluation of the customer’s financial condition. Accounts receivable are stated at their estimated net realizable value. The allowance for credit losses is based on an analysis of customer accounts, which considers history of past write-offs, collections, and current and future credit conditions. 
Disaggregation of Revenue
Our revenues related to the following types of business were as follows:

Three Months Ended June 30, Six Months Ended June 30,
2021 2020 2021 2020
Automotive $ 1,120,000  $ 85,000  $ 1,615,000  $ 85,000 
Aviation —  —  22,400  60,783 
Other 82,876  6,942  86,536  30,459 
Total revenues $ 1,202,876  $ 91,942  $ 1,723,936  $ 176,242 

Automotive - consists of sales of any of our electric delivery truck platforms.

Aviation - consists of sales of our drone systems.

Other - consists of shipping and handling charges, extended vehicle warranties, and non-warranty after-sales vehicle services.