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REVENUES
 9 Months Ended
Sep. 30, 2022
Revenue from Contract with Customer [Abstract]  
REVENUES

 

11. REVENUES

 

For each of the identified periods, revenues can be categorized into the following (in thousands):

                    
   Three Months Ended   Nine Months Ended 
   September 30,   September 30, 
   2022   2021   2022   2021 
Product sales  $6,268   $1,966   $13,022   $5,207 
Maintenance fees   17    11    37    34 
Professional services   60    18    491    74 
Shipping and handling   288    29    584    214 
Discounts and allowances   (22)   (3)   (35)   (15)
Total revenues  $6,611   $2,021   $14,099   $5,514 

 

During the three and nine months ended September 30, 2022 24% and 34% of revenues were derived from customers located in California, respectively. During the three and nine months ended September 30, 2021, 91% and 58% of revenues were derived from customers located in California, respectively. In addition, 2% of revenues in the nine months ended September 30, 2022 were international sales compared to none in the same period in the prior year.

 

At September 30, 2022 and December 31, 2021, deferred revenue was $1.6 million and $0.3 million, respectively. These amounts represented customer deposits in the amount of $1.3 million and $0.1 million for September 30, 2022 and December 31, 2021, respectively, and prepaid multi-year maintenance plans for previously sold products which account for $0.3 million and $0.2 million for September 30, 2022 and December 31, 2021, respectively, and pertain to services to be provided through 2028.