Earnings per share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings per share [Abstract]
Anti-dilutive stock options outstanding (in shares)	0	0
Reconciliation of the weighted average shares outstanding for the basic and diluted EPS computations [Abstract]
Net loss	$ (385)	$ (989)
Basic: [Abstract]
Shares outstanding at beginning of period (in shares)	15,592,000us-gaap_SharesOutstanding	15,473,000us-gaap_SharesOutstanding
Weighted average shares issued during the period, net (in shares)	4,000	26,000
Weighted average common shares, basic (in shares)	15,596,000	15,499,000
Net loss per common share, basic	$ (0.02)	$ (0.06)
Diluted: [Abstract]
Weighted average common shares, basic (in shares)	15,596,000	15,499,000
Dilutive impact of stock options and restricted stock awards (in shares)	0	0
Weighted average common shares, diluted (in shares)	15,596,000	15,499,000
Net loss per common share, diluted	$ (0.02)	$ (0.06)

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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

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The amount of net income (loss) derived from continuing operations during 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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Number of shares issued which are neither cancelled nor held in the treasury.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic).

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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