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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2014

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Schedule of changes in accumulated other comprehensive income (loss), by component

        Changes in accumulated other comprehensive income (loss), by component, were as follows (in thousands):

		Interest Rate Derivative Agreements			Projected Pension Benefit Obligation			Translation Adjustment			Total
Balance at December 31, 2012		$	(6,985	)	$	(1,318	)	$	6		$	(8,297	)
Adjust funded status of pension plan, net of tax of $0.2 million			—			(631	)		—			(631	)
Foreign currency translation adjustment			—			—			(259	)		(259	)
Other comprehensive income before reclassifications, net of taxes of $2.3 million			3,753			—			—			3,753
Amounts reclassified from accumulated other comprehensive income, net of taxes of $2.0 million			3,232			—			—			3,232
​	​	​	​	​	​	​	​	​	​	​	​	​	​
Balance at December 31, 2013			—			(1,949	)		(253	)		(2,202	)
Adjust funded status of pension plan, net of tax of $0.6 million			—			(723	)		—			(723	)
Foreign currency translation adjustment			—			—			4			4
​	​	​	​	​	​	​	​	​	​	​	​	​	​
Balance at December 31, 2014		$	—		$	(2,672	)	$	(249	)	$	(2,921	)
​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​

Schedule of percentage of revenues generated from a single customer that exceeds 10% of the Company's consolidated revenue

Customer		2012			2013			2014
Verizon			11	%		13	%		16	%
AT&T			20	%		18	%		26	%

Schedule of percentage of accounts receivable, from customers that exceed 10% of the Company's consolidated accounts receivable, net of allowances

Customer		2013			2014
AT&T			29	%		47	%
Verizon			10	%		7	%

Schedule of assets and liabilities of the Company measured at fair value on a recurring basis

		December 31, 2013
Description		Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)			Total
Certificates of deposit		$	—		$	363		$	363
Money market funds		$	2,244		$	—		$	2,244
​	​	​	​	​	​	​	​	​	​	​
Total assets measured at fair value		$	2,244		$	363		$	2,607
​	​	​	​	​	​	​	​	​	​	​

		December 31, 2014
Description		Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)			Total
Certificates of deposit		$	—		$	363		$	363
Money market funds		$	1,493		$	—		$	1,493
​	​	​	​	​	​	​	​	​	​	​
Total assets measured at fair value		$	1,493		$	363		$	1,856
​	​	​	​	​	​	​	​	​	​	​
Debt (Note 8)		$	—		$	38,877		$	38,877
​	​	​	​	​	​	​	​	​	​	​
Total liabilities measured at fair value		$	—		$	38,877		$	38,877
​	​	​	​	​	​	​	​	​	​	​

Schedule of reconciliation from basic to diluted weighted average common shares outstanding

        The reconciliation from basic to diluted weighted average common shares outstanding is as follows (in thousands):

		For the Year Ended December 31,
		2012			2013			2014
Basic weighted-average common shares outstanding			15,531			15,704			15,898
Stock options			88			113			115
​	​	​	​	​	​	​	​	​	​	​
Diluted weighted-average common shares outstanding			15,619			15,817			16,013
​	​	​	​	​	​	​	​	​	​	​

Schedule of anti-dilutive potential shares that were excluded from the computation of diluted weighted average shares outstanding

        The following notes the number of potential common shares not included in the above calculation because the effects of such were anti-dilutive (in thousands of shares):

		For the Year Ended December 31,
		2012			2013			2014
Stock options			367			61			—
​	​	​	​	​	​	​	​	​	​	​
Total			367			61			—
​	​	​	​	​	​	​	​	​	​	​

X

- Definition

Tabular disclosure of the percentage that a specified receivable or amount at risk from a counterparty under a contractual arrangement is to a specified benchmark, such as total receivables, net revenues, pretax results. Risk is the materially adverse effects of loss attributable to (a) the failure to collect a significant receivable from a major customer or group of homogeneous accounts, or (b) a failure by a counterparty to perform under terms of a contractual arrangement.

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Tabular disclosure of the percentage that revenues in the period from one or more significant customers is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of a significant customer.

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Tabular disclosure of the components of accumulated other comprehensive income (loss).

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Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).

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