8. Non-Cash Share-Based Employee Compensation (Details) (USD $)	3 Months Ended
Mar. 31, 2014
Notes to Financial Statements
Outstanding Stock Options, beginning	482,611
Vested Stock Options, beginning	410,942
Nonvested Stock Options, beginning	71,669
Issued Stock Options	5,000
Exercised Stock Options	55,833
Forfeited Stock Options
Expired Stock Options
Outstanding Stock Options, ending	431,778
Vested Stock Options, ending	373,443
Nonvested Stock Options, ending	58,335
Outstanding Wgt. Avg. Exercise Price, beginning	$ 3.50
Vested Wgt. Avg. Exercise Price, beginning	$ 3.64
Nonvested Wgt. Avg. Exercise Price, beginning	$ 2.68
Issued Wgt. Avg. Exercise Price	$ 3.14
Exercised Wgt. Avg. Exercise Price	$ 2.24
Forfeited Wgt. Avg. Exercise Price
Expired Wgt. Avg. Exercise Price
Outstanding Wgt. Avg. Exercise Price, ending	$ 3.65
Vested Wgt. Avg. Exercise Price, ending	$ 3.78
Nonvested Wgt. Avg. Exercise Price, ending	$ 2.86
Outstanding Contractual Life	4 years 1 month 17 days
Vested Contractual Life	3 years 10 months 13 days
Nonvested Contractual Life	2 years 10 months 10 days
Outstanding Grant Date Fair Value, beginning	$ 2.18
Vested Grant Date Fair Value, beginning	$ 2.41
Nonvested Grant Date Fair Value, beginning	$ 0.87
Issued Grant Date Fair Value	$ 0.08
Exercised Grant Date Fair Value	$ 1.15
Forfeited Grant Date Fair Value
Expired Grant Date Fair Value
Outstanding Grant Date Fair Value	$ 2.29
Vested Grant Date Fair Value	$ 2.55
Nonvested Grant Date Fair Value	$ 0.63
Outstanding Aggregate Intrinsic Value
Vested Aggregate Intrinsic Value
Nonvested Aggregate Intrinsic Value
Issued Aggregate Intrinsic Value
Exercised Aggregate Intrinsic Value
Forfeited Aggregate Intrinsic Value
Expired Aggregate Intrinsic Value
Outstanding Aggregate Intrinsic Value	236,232
Vested Aggregate Intrinsic Value	$ 211,814
Nonvested Aggregate Intrinsic Value	$ 24,418

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Per share weighted average intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The combined weighted average of the accumulated differences between the fair values on underlying shares and exercises prices to acquire such shares as of the grant date on options that were either forfeited or lapsed.

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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.

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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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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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As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the 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 remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share instruments newly issued under a share-based compensation plan.

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

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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