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Basis of Presentation (Earnings (Loss) Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Summary of computation of basic and diluted net income (loss) per share |  |
Net income | $ 754 us-gaap_NetIncomeLoss | $ 2,097 us-gaap_NetIncomeLoss
Shares used to compute basic income per share | 19,611,881 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted | 20,600,683 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Dilutive potential common shares: |  |
Restricted stock | 61,538 us-gaap_WeightedAverageNumberOfSharesRestrictedStock | 60,602 us-gaap_WeightedAverageNumberOfSharesRestrictedStock
Stock options | 957,369 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 546,738 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Shares used to compute diluted income per share | 20,630,788 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 21,208,023 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic per share amounts: |  |
Net income (in usd per share) | $ 0.04 us-gaap_EarningsPerShareBasic | $ 0.10 us-gaap_EarningsPerShareBasic
Diluted per share amounts: |  |
Net income (in usd per share) | $ 0.04 us-gaap_EarningsPerShareDiluted | $ 0.10 us-gaap_EarningsPerShareDiluted

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