Stock Option Plans and Warrants (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2010
Minimum range of exercise prices for outstanding options	$ 2.00
Maximum range of exercise prices for outstanding options	$ 60.92
Minimum range of exercise prices for options exercisable		$ 2.00
Maximum range of exercise prices for options exercisable		$ 60.92
Weighted average remaining contractual life of options outstanding (years)	4.8	4.8
Stock options minimum vesting period (years)		1
Stock options maximum vesting period (years)		3
Recognized compensation cost	$ 640,000
Deferred tax asset	130,000	130,000
Total unrecognized compensation cost related to non-vested stock options	3,100,000	3,100,000
Cash received from exercise of options	6,000
Dividend Yield	0.00%	0.00%	0.00%
Restricted Stock Units [Member]
Number of restricted stock units issued to employees, net of forfeitures		28,685
Average price restricted stock units		11.53
Restricted Stock [Member]
Number of restricted stock units issued to employees, net of forfeitures		7,583
Average price restricted stock units		$ 11.25

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Share Based Compensation Shares Exercisable Under Stock Option Plans Exercise Price Range Lower Range Limit

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The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from equity-based compensation costs, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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