Deferred Revenue

Changes in deferred revenue, which relate to unfulfilled e-commerce orders and amounts to be recognized under extended 3-year service warranties, for the year ended November 30, 2022 and 2021 are summarized below. 

Revenue Disaggregation

The following table presents disaggregation of the Company’s revenue by market and distribution channel (in thousands):

Accounts Receivable

The Company records accounts receivables due from dealers/distributors, large end-users such as retail stores, security companies and law enforcement agencies.  Payment terms to customers other than e-commerce customers are generally 30-60 days for established customers, whereas new wholesale and large end-user customers have prepaid terms for their first order.  Accounts receivable, net of allowances, was $5.9 million, $1.7 million, and $0.8 millions as of  November 30, 2022, 2021 and 2020 respectively.

An allowance for doubtful accounts receivable is maintained for potential credit losses based upon management's assessment of the expected collectability of all accounts receivable.  As of  November 30, 2022, 2021 and 2020, the allowance for doubtful accounts receivable totaled less than $0.02 million for each year.