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Accounts Receivable
12 Months Ended
Dec. 31, 2021
Accounts Receivable.  
Accounts Receivable

5. Accounts Receivable

Accounts receivable, net consist of the following:

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December 31,

​

      

2021

      

2020

Billed receivables

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$

160,407

​

$

179,696

Unbilled receivables

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​

22,570

​

​

23,210

Other

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​

7,174

​

​

9,609

Less: Allowance for doubtful accounts

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​

(6,049)

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​

(5,647)

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​

$

184,102

​

$

206,868

​

Unbilled receivables represent balances recognized as revenue that have not been billed to the customer. The Company’s allowance for doubtful accounts is based on a policy developed by historical experience and management judgment. Adjustments to the allowance for doubtful accounts may occur based on market conditions or specific client circumstances.