SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2015

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):

	Projected
	Pension
	Benefit		Translation
	Obligation		Adjustment		Total
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)
Adjust funded status of pension plan, net of tax of $0.7 million		(809)		—		(809)
Foreign currency translation adjustment		—		26		26
Balance at December 31, 2015	$	(3,481)	$	(223)	$	(3,704)

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

Customer	2013		2014		2015
Verizon	13	%	16	%	19	%
AT&T	18	%	26	%	17	%

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

Customer	2014		2015
AT&T	47	%	17	%
Verizon	7	%	13	%

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

	December 31, 2014
			Significant Other
	Quoted Prices in		Observable
	Active Markets		Inputs
Description	(Level 1)		(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

	December 31, 2015
			Significant Other
	Quoted Prices in		Observable
	Active Markets		Inputs
Description	(Level 1)		(Level 2)		Total
Certificates of deposit	$	—	$	377	$	377
Money market funds	$	76,263	$	—	$	76,263
Total assets measured at fair value	$	76,263	$	377	$	76,640

Schedule of reconciliation from basic to diluted weighted average common shares outstanding (in thousands)

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

	Year ended December 31,
	2013	2014	2015
Basic weighted-average common shares outstanding	15,704	15,898	16,022
Stock options	113	115	120
Diluted weighted-average common shares outstanding	15,817	16,013	16,142

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,
	2013	2014	2015
Stock options	61	—	2
Total	61	—	2