SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2016

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		Short Term
	Obligation		Adjustment		Investment		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)
Adjust funded status of pension plan, net of tax of $0.7 million		5,251		—		—		5,251
Foreign currency translation adjustment		—		(687)		—		(687)
Unrealized gain on marketable securities		—		—		868		868
Balance at December 31, 2016	$	1,770	$	(910)	$	868	$	1,728

Amounts totaling $1.3 million, $0.2 million, and $0.2 million were reclassified from other comprehensive income to general and administrative operating expense related to the Company’s defined pension plans for the years ending December 31, 2016, 2015, and 2014, respectively.

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

Customer	2016		2015		2014
Verizon	12	%	19	%	16	%
AT&T	14	%	17	%	26	%

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

Customer	2016		2015
AT&T	17	%	17	%
Verizon	12	%	13	%

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

	December 31, 2016
			Significant Other
	Quoted Prices in		Observable
	Active Markets		Inputs
Description	(Level 1)		(Level 2)		Total
Certificates of deposit	$	—	$	391	$	391
Money market funds	$	29,027	$	—	$	29,027
Short term investments	$	1,751	$	7,486	$	9,237
Commercial Paper	$	—	$	29,981	$	29,981
Total assets measured at fair value	$	30,778	$	37,858	$	68,636

	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

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

	Year ended December 31,
	2016	2015	2014
Basic weighted-average shares of common stock outstanding	16,131	16,022	15,898
Stock options	96	120	115
Diluted weighted-average shares of common stock outstanding	16,227	16,142	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 share Common Stock not included in the above calculation because the effects of such were anti‑dilutive (in thousands of shares):

	For the Year Ended
	December 31,
	2016	2015	2014
Stock options	5	2	—
Total	5	2	—