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Note 10 - Revenues
 9 Months Ended
Sep. 30, 2022
Notes to Financial Statements  
Revenue from Contract with Customer [Text Block]

10.

Revenues

 

The following tables represent a disaggregation of revenue from contracts with customers for the three and nine months ended September 30, 2022 and 2021:

 

  

Three Months Ended September 30,

  

Nine Months Ended September 30,

 

(in thousands)

 

2022

  

2021

  

2022

  

2021

 

Instruments, equipment, software and accessories

 $25,705  $28,485  $81,008  $82,304 

Service, maintenance and warranty contracts

  1,217   1,178   3,900   3,545 

Total revenues

 $26,922  $29,663  $84,908  $85,849 

 

The following tables represent a disaggregation of revenue by geographic destination for the three and nine months ended September 30, 2022 and 2021:

 

  

Three Months Ended September 30,

  

Nine Months Ended September 30,

 

(in thousands)

 

2022

  

2021

  

2022

  

2021

 

United States

 $11,511  $12,709  $38,278  $37,300 

Europe

  7,344   8,366   22,361   25,569 

Asia

  6,730   7,161   19,080   18,588 

Rest of the world

  1,337   1,427   5,189   4,392 

Total revenues

 $26,922  $29,663  $84,908  $85,849 

 

Deferred Revenue

 

The following tables provide details of deferred revenue as of the periods indicated:

 

  

September 30,

  

December 31,

 

(in thousands)

 

2022

  

2021

 

Service contracts

 $1,642  $1,976 

Customer advances

  2,000   2,290 

Total deferred revenue

 $3,642  $4,266 

 

During the nine months ended September 30, 2022 and 2021 the Company recognized revenue of $2.1 million and $1.8 million from contract liabilities existing at December 31, 2021 and 2020, respectively.

 

Allowance for Doubtful Accounts

 

Allowance for doubtful accounts is based on the Company’s assessment of the collectability of accounts receivable. Activity in the allowance for doubtful accounts is as follows:

 

  

Nine Months Ended September 30,

 

(in thousands)

 

2022

  

2021

 

Balance, beginning of period

 $136  $227 

Bad debt expense (credit)

  103   (13)

Charge-offs and other

  (60)  (76)

Balance, end of period

 $179  $138 

 

Concentrations

 

No customer accounted for more than 10% of revenues for the three and nine months ended September 30, 2022 and 2021. At September 30, 2022 and December 21, 2021, no customer accounted for more than 10% of net accounts receivable.