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Consolidated Financial Statements' Components
 3 Months Ended
Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Consolidated Financial Statements' Components CONSOLIDATED FINANCIAL STATEMENTS' COMPONENTS
Depreciation and Accretion
Depreciation and accretion expenses consisted of the following for the periods stated:
For the Three Months Ended March 31,
(Dollars in thousands)20242023
Depreciation
Leasehold improvements$36 $13 
Asset retirement costs(104)66 
Paging and computer equipment901 938 
Furniture, fixtures and vehicles61 55 
Total depreciation894 1,072 
Accretion174 164 
Total depreciation and accretion expense$1,068 $1,236 
Accounts Receivable, Net
Accounts receivable was recorded net of an allowance of $1.4 million at March 31, 2024, and $1.6 million at December 31, 2023. Accounts receivable, net includes $7.6 million and $6.0 million of unbilled receivables at March 31, 2024, and December 31, 2023, respectively. Unbilled receivables are defined as the Company's right to consideration in exchange for goods or services that we have transferred to the customer but have not yet billed for, generally as a result of contractual billing terms.
Property and Equipment, Net
Property and equipment, net consisted of the following as of the dates stated:
(Dollars in thousands)Useful Life
 (In Years)		March 31, 2024December 31, 2023
Leasehold improvements
lease term
$2,217 $2,202 
Asset retirement costs
1-5
3,722 3,722 
Paging and computer equipment
1-5
86,197 86,332 
Furniture, fixtures and vehicles
3-5
3,224 3,129 
Total property and equipment95,360 95,385 
Accumulated depreciation(88,054)(88,064)
Total property and equipment, net$7,306 $7,321