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Basis of Presentation (Details) (USD $) In Thousands, except 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
Summary of computation of basic and diluted net income (loss) per share |  |  |  |  |  |  |  |  |  |  |
Net income (loss) from continuing operations | $ 6,730us-gaap_IncomeLossFromContinuingOperations | $ 777us-gaap_IncomeLossFromContinuingOperations | $ 1,288us-gaap_IncomeLossFromContinuingOperations | $ 2,097us-gaap_IncomeLossFromContinuingOperations | $ 1,869us-gaap_IncomeLossFromContinuingOperations | $ 1,965us-gaap_IncomeLossFromContinuingOperations | $ 3,694us-gaap_IncomeLossFromContinuingOperations | $ 1,304us-gaap_IncomeLossFromContinuingOperations | $ 12,024us-gaap_IncomeLossFromContinuingOperations | $ 8,832us-gaap_IncomeLossFromContinuingOperations | $ (2,674)us-gaap_IncomeLossFromContinuingOperations
Discontinued operations |  |  |  |  |  |  |  |  | 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | 2,588us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | 2,147us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net income | $ 7,055us-gaap_NetIncomeLoss | $ 1,280us-gaap_NetIncomeLoss | $ 1,592us-gaap_NetIncomeLoss | $ 2,097us-gaap_NetIncomeLoss | $ 1,869us-gaap_NetIncomeLoss | $ 1,965us-gaap_NetIncomeLoss | $ 6,091us-gaap_NetIncomeLoss | $ 1,495us-gaap_NetIncomeLoss | $ 12,024us-gaap_NetIncomeLoss | $ 11,420us-gaap_NetIncomeLoss | $ (527)us-gaap_NetIncomeLoss
Shares used to compute basic income (loss) per share |  |  |  |  |  |  |  |  | 20,418,569us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted | 20,312,395us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted | 19,853,095us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Dilutive potential common shares: |  |  |  |  |  |  |  |  |  |  |
Stock options (shares) |  |  |  |  |  |  |  |  | 978,162us-gaap_WeightedAverageNumberOfSharesRestrictedStock | 352,959us-gaap_WeightedAverageNumberOfSharesRestrictedStock | 0us-gaap_WeightedAverageNumberOfSharesRestrictedStock
Restricted stock (shares) |  |  |  |  |  |  |  |  | 36,446us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 80,100us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Shares used to compute diluted income (loss) per share | 20,792,363us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 21,345,311us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 21,780,034us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 21,208,023us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 21,056,156us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 20,843,742us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 20,427,360us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 20,280,030us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 21,433,177us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 20,745,454us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 19,853,095us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic per share amounts: |  |  |  |  |  |  |  |  |  |  |
(Loss) income from continuing operations (in usd per share) | $ 0.35us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.06us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.08us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.10us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.09us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.10us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.18us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.06us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.59us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.43us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ (0.14)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Income from discontinued operations (in usd per share) | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.12us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.01us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.13us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.11us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Net income (loss) (in usd per share) | $ 0.35us-gaap_EarningsPerShareBasic | $ 0.06us-gaap_EarningsPerShareBasic | $ 0.08us-gaap_EarningsPerShareBasic | $ 0.10us-gaap_EarningsPerShareBasic | $ 0.09us-gaap_EarningsPerShareBasic | $ 0.10us-gaap_EarningsPerShareBasic | $ 0.30us-gaap_EarningsPerShareBasic | $ 0.07us-gaap_EarningsPerShareBasic | $ 0.59us-gaap_EarningsPerShareBasic | $ 0.56us-gaap_EarningsPerShareBasic | $ (0.03)us-gaap_EarningsPerShareBasic
Diluted per share amounts: |  |  |  |  |  |  |  |  |  |  |
(Loss) income from continuing operations (in usd per share) | $ 0.34us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.06us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.07us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.10us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.09us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.09us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.18us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.06us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.56us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.43us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ (0.14)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Income from discontinued operations (in usd per share) | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.12us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.01us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.12us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.11us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Net income (loss) (in usd per share) | $ 0.34us-gaap_EarningsPerShareDiluted | $ 0.06us-gaap_EarningsPerShareDiluted | $ 0.07us-gaap_EarningsPerShareDiluted | $ 0.10us-gaap_EarningsPerShareDiluted | $ 0.09us-gaap_EarningsPerShareDiluted | $ 0.09us-gaap_EarningsPerShareDiluted | $ 0.30us-gaap_EarningsPerShareDiluted | $ 0.07us-gaap_EarningsPerShareDiluted | $ 0.56us-gaap_EarningsPerShareDiluted | $ 0.55us-gaap_EarningsPerShareDiluted | $ (0.03)us-gaap_EarningsPerShareDiluted

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Balance Type: | na
Period Type: | duration

X
- Definition Number of shares of restricted stock determined by relating the portion of time within a reporting period that restricted shares have been outstanding to the total time in that period. Restricted shares are subject to sales, contractual, regulatory or other restrictions that prevent or inhibit the holder from freely disposing of them before the restriction ends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2646-109256 + Details
Name: | us-gaap_WeightedAverageNumberOfSharesRestrictedStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration