Stock Options (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Number of Shares
Balance, December 31, 2014 (shares)	305,099
Granted (shares)	0
Forfeited (shares)	0
Exercised (shares)	(12,000)
Ending balance (shares)	293,099
Outstanding exercisable options at end of quarter (shares)	293,099
Weighted Average Exercise Price (in dollars per share)
Beginning balance (usd per share)	$ 1.98
Granted (usd per share)	$ 0.00
Forfeited (usd per share)	$ 0.00
Exercised (usd per share)	$ 1.76
Ending balance (usd per share)	$ 1.97
Outstanding exercisable options at end of quarter (usd per share)	$ 1.98
Intrinsic value of outstanding options	$ 143
Intrinsic value of exercisable options	$ 143

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Number of share options (or share units) exercised during the current period.

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