4. Earnings per share (Details) - Earnings per share reconciliation (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share Reconciliation [Abstract]
Net income (in Dollars)	$ 144us-gaap_NetIncomeLoss	$ 394us-gaap_NetIncomeLoss
Basic: Weighted average common shares outstanding	7,856	8,373
Add: Dilutive effect of outstanding options as determined by the treasury stock method	20	180
Diluted: Weighted average common and common equivalent shares outstanding	7,876	8,553
Net income per common share:
Basic (in Dollars per share)	$ 0.02us-gaap_EarningsPerShareBasic	$ 0.05us-gaap_EarningsPerShareBasic
Diluted (in Dollars per share)	$ 0.02us-gaap_EarningsPerShareDiluted	$ 0.05us-gaap_EarningsPerShareDiluted

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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