Quarterly Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$ 69,115us-gaap_Revenues	$ 52,121us-gaap_Revenues	$ 48,222us-gaap_Revenues	$ 48,207us-gaap_Revenues	$ 58,799us-gaap_Revenues	$ 52,603us-gaap_Revenues	$ 50,683us-gaap_Revenues	$ 44,480us-gaap_Revenues	$ 217,665us-gaap_Revenues	$ 206,565us-gaap_Revenues	$ 194,548us-gaap_Revenues
Gross profit	24,325us-gaap_GrossProfit	16,962us-gaap_GrossProfit	16,023us-gaap_GrossProfit	15,265us-gaap_GrossProfit	17,750us-gaap_GrossProfit	16,873us-gaap_GrossProfit	17,007us-gaap_GrossProfit	14,440us-gaap_GrossProfit	72,575us-gaap_GrossProfit	66,070us-gaap_GrossProfit	48,371us-gaap_GrossProfit
Income (loss) before income taxes and discontinued operations	8,611	86	(4)	(411)	2,104	1,875	2,138	(526)	8,282	5,591	(9,653)
Net income (Loss) from continuing operations	$ 8,505	$ 40	$ (78)	$ (412)	$ 2,236	$ 1,775	$ 2,089	$ (560)	$ 8,055	$ 5,540	$ (10,402)
Basic and diluted net income (loss) per share from continuing operations	$ 0.14	$ 0.00	$ 0.00	$ (0.01)	$ 0.03	$ 0.03	$ 0.04	$ (0.01)	$ 0.13	$ 0.09	$ (0.18)

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.13)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(1)(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

+ References

No definition available.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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