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Consolidated Financial Statements' Components (Tables)
 12 Months Ended
Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of Depreciation, Amortization and Accretion
Depreciation, amortization and accretion consisted of the following for the periods stated:
For the Year Ended December 31,
(Dollars in thousands)202220212020
Depreciation
Leasehold improvements$64 $88 $57 
Asset retirement costs(702)(87)(643)
Paging and computer equipment3,289 3,797 5,291 
Furniture, fixtures and vehicles240 258 307 
Total depreciation2,891 4,056 5,012 
Amortization
Intangible assets— 417 2,500 
Capitalized software development costs— 5,357 1,073 
Total amortization— 5,774 3,573 
Accretion680 616 471 
Total depreciation, amortization and accretion expense$3,571 $10,446 $9,056 
Schedule of Property, Plant and Equipment
Property and equipment, net consisted of the following for the periods stated:
Useful Life
 (In Years)		For the Year Ended December 31,
(Dollars in thousands)20222021
Leasehold improvementslease term$2,497 $3,307 
Asset retirement costs
1-5
3,848 2,307 
Paging and computer equipment
1-5
88,427 89,844 
Furniture, fixtures and vehicles
3-5
3,289 3,668 
Total property and equipment98,061 99,126 
Accumulated depreciation(89,838)(92,380)
Total property and equipment, net$8,223 $6,746