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Revenue
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Revenue    
Revenue

Note 3 — Revenue

The following tables summarize the Company’s revenue, net disaggregated by type of product and service:

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​

​

​

​

​

​

​

​

​

Three Months Ended March 31,

​

    

2024

    

2023

Product sales

​

$

2,022

​

$

755

Software as a service and related services

​

 

200

​

 

179

Ancillary services

​

 

53

​

 

46

Total revenue

​

$

2,275

​

$

980

​

Consideration promised in the Company’s contracts with customers is variable due to anticipated reductions, such as sales returns, discounts and miscellaneous claims from customers. The Company estimates the most likely amount it will be entitled to receive and

records an anticipated reduction against Revenues, with an offsetting increase to accrued expenses at the time revenues are recognized. The Company had sales returns from prior periods of $2,880 for the three months ended March 31, 2024, which was a reduction against Revenues. There is no sales return reserve as of March 31, 2024, and December 31, 2023.

Contract Liabilities

Contract liabilities consist of sales of SaaS subscriptions and related services, as well as repair and service agreements, where in most cases, the Company receives up-front payment and recognizes revenue over the support term of 12-60 months. The Company classifies these contract liabilities as either current or non-current liabilities based on the expected timing of recognition of related revenue. The following table summarizes the change in contract liabilities:

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​

​

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Contract liabilities

Balance at January 1, 2023

​

$

297

Prepayments and adjustments

​

 

2,552

Revenue recognition

​

 

(784)

Balance at December 31, 2023

​

 

2,065

Contract liabilities, non-current

​

$

121

Balance at January 1, 2024

​

$

2,065

Prepayments and adjustments

​

 

(711)

Revenue recognition

​

 

(200)

Balance at March 31, 2024

​

 

1,154

Contract liabilities, non-current

​

$

238

​

Note 4 — Revenue

The following table summarizes the Company’s revenue disaggregated by type of product and service:

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​

​

​

​

​

​

​

​

    

2023

    

2022

Product sales

​

$

4,270

​

$

6,681

Software as a service and related services

​

 

784

​

 

348

Ancillary services

​

 

376

​

 

239

Total revenue

​

$

5,430

​

$

7,268

​

In 2023 and 2022, $4,646 and $6,920 of the Company’s revenues were recognized as point in time and $784 and $348 revenues were recognized over time, respectively.

Contract Liabilities

Contract liabilities consist of sales of SaaS subscriptions and related services, as well as repair and service agreements, where in most cases, the Company receives prepayments and recognizes revenue over the support term of 12-36 months. The Company classifies these contract liabilities as either current or non-current liabilities based on the expected timing of recognition of related revenue. The following table summarizes the change in contract liabilities:

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​

​

​

​

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Contract liabilities

Balance at January 1, 2022

​

$

75

Prepayments

​

 

570

Revenue recognition

​

 

(348)

Balance at December 31, 2022

​

 

297

Prepayments

​

 

2,552

Revenue recognition

​

 

(784)

Balance at December 31, 2023

​

$

2,065

Contract liabilities, noncurrent

​

 

121

​

Remaining performance obligations

As of December 31, 2023, the Company had $2,065 in remaining performance obligations, of which $1,944 will be completed by the year ended December 31, 2024, and $121 will be completed by the year ended January 31, 2028.

Accounts Receivables Allowance

The following table summarizes the change in the accounts receivables allowance:

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​

​

​

​

​

​

​

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December 31,

​

​

2023

​

2022

Beginning balance

    

$

290

    

$

145

Reversal of account receivables allowance

​

 

(304)

​

 

(13)

Bad debt expense

​

 

194

​

 

158

Ending balance

​

$

180

​

$

290

​