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Business Segment, Geographic and Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Summary of Quarterly Financial Data [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 18,684 us-gaap_SalesRevenueNet | $ 24,207 us-gaap_SalesRevenueNet | $ 21,482 us-gaap_SalesRevenueNet | $ 20,190 us-gaap_SalesRevenueNet | $ 18,661 us-gaap_SalesRevenueNet | $ 33,555 us-gaap_SalesRevenueNet | $ 29,092 us-gaap_SalesRevenueNet | $ 22,484 us-gaap_SalesRevenueNet |  |  |
Cost of sales | 9,820 us-gaap_CostOfGoodsAndServicesSold | (13,787)us-gaap_CostOfGoodsAndServicesSold | 11,582 us-gaap_CostOfGoodsAndServicesSold | 11,677 us-gaap_CostOfGoodsAndServicesSold | 10,810 us-gaap_CostOfGoodsAndServicesSold | (18,455)us-gaap_CostOfGoodsAndServicesSold | (17,227)us-gaap_CostOfGoodsAndServicesSold | (13,052)us-gaap_CostOfGoodsAndServicesSold |  |  |
Net (loss) income | $ (17,111)us-gaap_NetIncomeLoss | $ 406 us-gaap_NetIncomeLoss | $ 1,192 us-gaap_NetIncomeLoss | $ (720)us-gaap_NetIncomeLoss | $ (1,086)us-gaap_NetIncomeLoss | $ 3,480 us-gaap_NetIncomeLoss | $ 1,236 us-gaap_NetIncomeLoss | $ (21)us-gaap_NetIncomeLoss | $ (17,725)us-gaap_NetIncomeLoss | $ 5,101 us-gaap_NetIncomeLoss | $ 2,776 us-gaap_NetIncomeLoss
Net (loss) income per common share: |  |  |  |  |  |  |  |  |  |  |
Basic | $ (0.75)us-gaap_EarningsPerShareBasic | $ 0.02 us-gaap_EarningsPerShareBasic | $ 0.05 us-gaap_EarningsPerShareBasic | $ (0.03)us-gaap_EarningsPerShareBasic | $ (0.05)us-gaap_EarningsPerShareBasic | $ 0.16 us-gaap_EarningsPerShareBasic | $ 0.06 us-gaap_EarningsPerShareBasic | $ 0.00 us-gaap_EarningsPerShareBasic | $ (0.78)us-gaap_EarningsPerShareBasic | $ 0.23 us-gaap_EarningsPerShareBasic | $ 0.12 us-gaap_EarningsPerShareBasic
Diluted | $ (0.75)us-gaap_EarningsPerShareDiluted | $ 0.02 us-gaap_EarningsPerShareDiluted | $ 0.05 us-gaap_EarningsPerShareDiluted | $ (0.03)us-gaap_EarningsPerShareDiluted | $ (0.05)us-gaap_EarningsPerShareDiluted | $ 0.15 us-gaap_EarningsPerShareDiluted | $ 0.05 us-gaap_EarningsPerShareDiluted | $ 0.00 us-gaap_EarningsPerShareDiluted | $ (0.01)us-gaap_EarningsPerShareDiluted | $ 0.23 us-gaap_EarningsPerShareDiluted | $ 0.12 us-gaap_EarningsPerShareDiluted

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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