Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Consolidated Statements Of Operations [Abstract]
Revenues	$ 106,982	$ 65,044	$ 293,673	$ 174,910
Cost of sales (excluding depreciation and amortization)	80,077	46,973	221,368	131,467
Gross profit	26,905	18,071	72,305	43,443
Operating expenses:
General and administrative	17,995	14,280	50,334	40,994
Selling, marketing and service	2,515	2,136	8,236	6,611
Depreciation and amortization	$ 2,707	2,181	7,796	6,496
Restructuring charges				427
Total operating expenses	$ 23,217	18,597	66,366	54,528
Operating income (loss)	3,688	(526)	5,939	(11,085)
Other income and (expenses):
Interest income and other income	1	5	4	14
Interest expense	(312)	(329)	(868)	(921)
Income (loss) before income taxes	3,377	(850)	5,075	(11,992)
Income tax expense (benefit)	1,385	(314)	2,091	(4,449)
Net income (loss)	$ 1,992	$ (536)	$ 2,984	$ (7,543)
Earnings (loss) per share:
Basic	$ 0.09	$ (0.02)	$ 0.13	$ (0.34)
Diluted	$ 0.09	$ (0.02)	$ 0.13	$ (0.34)
Weighted average common shares outstanding during the period:
Basic	22,469	22,353	22,435	22,228
Diluted	22,583	22,353	22,558	22,228