Consolidated Financial Statement Components (Tables)

9 Months Ended

Sep. 30, 2017

Supplemental Financial Statement Components [Abstract]

Prepaid Expenses and Other

Prepaid expenses and other consisted of the following as of the date stated:

(Dollars in thousands)	September 30, 2017		December 31, 2016
Prepaid repairs and maintenance	$	2,517	$	1,561
Prepaid commissions	1,622		594
Prepaid taxes	862		100
Other prepaid expenses	1,636		2,129
Total prepaid expenses and other	$	6,637	$	4,384

Summary of Depreciation, Amortization and Accretion

Depreciation, amortization and accretion expenses consisted of the following for the periods stated:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(Dollars in thousands)	2017			2016			2017			2016
Depreciation
Leasehold improvements	$	50		$	47		$	175		$	145
Asset retirement costs	(97		)	(69		)	(292		)	(209		)
Paging and computer equipment	1,990			2,015			6,077			6,010
Furniture, fixtures and vehicles	66			73			207			221
Total depreciation	2,009			2,066			6,167			6,167
Amortization	625			1,007			2,261			3,153
Accretion	141			156			421			467
Total depreciation, amortization and accretion expense	$	2,775		$	3,229		$	8,849		$	9,787

Property, Plant and Equipment

Property and equipment, net consisted of the following as of the date stated:

(Dollars in thousands)	Useful Life (In Years)	September 30, 2017			December 31, 2016
Leasehold improvements	shorter of useful life or lease term	$	4,083		$	3,843
Asset retirement costs	1-5	3,289			3,263
Paging and computer equipment	1-5	112,827			113,175
Furniture, fixtures and vehicles	3-5	4,551			2,852
Total property and equipment		124,750			123,133
Accumulated depreciation		(111,044		)	(110,315		)
Total property and equipment, net		$	13,706		$	12,818

Components of Other Current Liabilities

Other current liabilities consisted of the following as of the date stated:

(Dollars in thousands)	September 30, 2017		December 31, 2016
Accrued outside services	$	999	$	975
Accrued network costs	630		773
Accrued accounting and legal	277		467
Asset retirement obligations	235		85
Deferred rent and other	44		433
Total other current liabilities	$	2,185	$	2,733

Summary of Other Non-Current Liabilities

Other non-current liabilities consisted of the following as of the date stated:

(Dollars in thousands)	September 30, 2017		December 31, 2016
Asset retirement obligations	$	7,580	$	7,472
Deferred rent and other	872		942
Dividends payable	168		507
Total other non-current liabilities	$	8,620	$	8,921