Consolidated Financial Statements' Components (Tables)

12 Months Ended

Dec. 31, 2018

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)	2018			2017			2016
Depreciation
Leasehold improvements	$	232		$	234		$	189
Asset retirement costs	(300		)	(388		)	(277		)
Paging and computer equipment	7,397			8,024			7,974
Furniture, fixtures and vehicles	398			306			294
Total depreciation	7,727			8,176			8,180
Amortization	2,500			2,886			4,160
Accretion	542			562			623
Total depreciation, amortization and accretion expense	$	10,769		$	11,624		$	12,963

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)		2018			2017
Leasehold improvements	lease term	$	4,139		$	4,107
Asset retirement costs	1-5	2,021			3,228
Paging and computer equipment	1-5	98,401			103,520
Furniture, fixtures and vehicles	3-5	4,353			4,545
Total property and equipment		108,914			115,400
Accumulated depreciation		(98,560		)	(102,001		)
Total property and equipment, net		$	10,354		$	13,399

Components of Other Liabilities

Other current liabilities consisted of the following for the periods stated:

	December 31,
(Dollars in thousands)	2018		2017
Accrued network costs, asset retirement obligations and other	1,870		2,557
Accrued outside services	$	1,613	$	2,053
Total other current liabilities	$	3,483	$	4,610

Summary of Other Long-Term Liabilities

Other non-current liabilities consisted of the following for the periods stated:

	December 31,
(Dollars in thousands)	2018		2017
Asset retirement obligations	$	6,513	$	7,174
Other	1,221		901
Total other non-current liabilities	$	7,734	$	8,075