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	$ 6,730	$ 777	$ 1,288	$ 2,097	$ 1,869	$ 1,965	$ 3,694	$ 1,304	$ 12,024	$ 8,832	$ (2,674)
Discontinued operations									0	2,588	2,147
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									20,418,569	20,312,395	19,853,095
Dilutive potential common shares:
Stock options (shares)									978,162	352,959	0
Restricted stock (shares)									36,446	80,100	0
Shares used to compute diluted income (loss) per share	20,792,363	21,345,311	21,780,034	21,208,023	21,056,156	20,843,742	20,427,360	20,280,030	21,433,177	20,745,454	19,853,095
Basic per share amounts:
(Loss) income from continuing operations (in usd per share)	$ 0.35	$ 0.06	$ 0.08	$ 0.10	$ 0.09	$ 0.10	$ 0.18	$ 0.06	$ 0.59	$ 0.43	$ (0.14)
Income from discontinued operations (in usd per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.12	$ 0.01	$ 0.00	$ 0.13	$ 0.11
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)	$ 0.34	$ 0.06	$ 0.07	$ 0.10	$ 0.09	$ 0.09	$ 0.18	$ 0.06	$ 0.56	$ 0.43	$ (0.14)
Income from discontinued operations (in usd per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.12	$ 0.01	$ 0.00	$ 0.12	$ 0.11
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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