QUARTERLY FINANCIAL DATA (UNAUDITED)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

QUARTERLY FINANCIAL DATA (UNAUDITED)

14. QUARTERLY FINANCIAL DATA (UNAUDITED)

	2015
	1st			2nd			3rd			4th
Operating Results:
Revenue	$	55,054		$	52,886		$	63,716		$	76,963
Operating expense:
Network and facilities expense (excluding depreciation    and amortization)		22,765			21,295			34,858			46,427
Operations		7,620			7,391			7,955			8,204
Sales and marketing		643			765			690			776
General and administrative		4,555			4,942			4,648			4,363
Depreciation and amortization		2,643			2,600			2,894			3,255
Loss (gain) on sale of property and equipment		33			(149	)		(4	)		10
Total operating expense		38,259			36,844			51,041			63,035
Income from operations		16,795			16,042			12,675			13,928
Other (income) expense:
Interest expense (income)		16			11			9			(7	)
Other income		(1,290	)		—			—			—
Total (income) other expense		(1,274	)		11			9			(7	)
Income before provision for income taxes		18,069			16,031			12,666			13,935
Provision for income taxes		6,887			6,031			4,399			5,255
Net income	$	11,182		$	10,000		$	8,267		$	8,680
Per Share Data:
Earnings per common share-net income-basic	$	0.33		$	0.30		$	0.25		$	0.26
Earnings per common share-net income-diluted	$	0.33		$	0.29		$	0.24		$	0.25
Weighted average number of shares outstanding-basic		33,496			33,568			33,620			33,843
Weighted average number of shares outstanding-diluted		33,970			34,033			34,138			34,213

	2014
	1st		2nd			3rd		4th
Operating Results:
Revenue	$	56,217	$	54,881		$	54,045	$	55,365
Operating expense:
Network and facilities expense (excluding depreciation    and amortization)		24,890		23,129			23,016		23,960
Operations		7,307		7,202			7,432		7,355
Sales and marketing		676		818			1,048		722
General and administrative		3,800		5,254			3,645		4,141
Depreciation and amortization		3,141		3,010			2,985		2,681
(Gain) loss on sale of property and equipment		—		(31	)		2		(31	)
Loss on sale of Americas Data assets		1,081		—			—		—
Total operating expense		40,895		39,382			38,128		38,828
Income from operations		15,322		15,499			15,917		16,537
Other expense (income):
Interest expense		2		17			18		14
Other (income)		—		(2	)		—		—
Total other expense		2		15			18		14
Income before provision for income taxes		15,320		15,484			15,899		16,523
Provision for income taxes		6,127		6,036			6,123		6,417
Net income	$	9,193	$	9,448		$	9,776	$	10,106
Per Share Data:
Earnings per common share-net income-basic	$	0.28	$	0.29		$	0.30	$	0.30
Earnings per common share-net income-diluted	$	0.28	$	0.28		$	0.29	$	0.30
Weighted average number of shares outstanding-basic		32,273		32,832			33,115		33,316
Weighted average number of shares outstanding-diluted		32,616		33,369			33,343		33,785