Significant Accounting Policies (Stock Transactions - Stock Option Plans Tables) (Details) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Significant Accounting Policies [Abstract]
Options Outstanding, shares	516,332
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	25,000
Options exercised, shares		(3,841)
Options Outstanding, shares	541,332		516,332
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	415,837
Weighted Average exercise Price: Options Outstanding	$ 7.06
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 6.02
Weighted Average exercise Price: Options Outstanding	$ 7.01		$ 7.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 7.21
Weighted Average Remaining Contractual Life (in years): Options Outstanding	5 years 4 months 24 days		5 years 4 months 24 days
Weighted Average Remaining Contractual Life (in years): Options Outstanding	5 years 4 months 24 days		5 years 4 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	4 years 3 months 18 days
Aggregate Intrinsic Value: Options Outstanding	$ 327,725
Aggregate Intrinsic Value: Options Outstanding	391,318		327,725
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 363,559

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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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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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