Share-Based Compensation (Details) - Stock options outstanding and exercisable (USD $)	12 Months Ended
Dec. 31, 2012	Mar. 31, 2013
Share-Based Compensation (Details) - Stock options outstanding and exercisable [Line Items]
Number Outstanding and Exercisable	6,500	1,500
Weighted Average Remaining Contractual Life	1 year 219 days
Weighted Average Exercise Price (in Dollars per share)	$ 5.57
0.65 - 1.99 [Member]
Share-Based Compensation (Details) - Stock options outstanding and exercisable [Line Items]
Number Outstanding and Exercisable	1,500
Weighted Average Remaining Contractual Life	2 years 292 days
Weighted Average Exercise Price (in Dollars per share)	$ 0.78
7.00 - 7.99 [Member]
Share-Based Compensation (Details) - Stock options outstanding and exercisable [Line Items]
Number Outstanding and Exercisable	5,000
Weighted Average Remaining Contractual Life	1 year 109 days
Weighted Average Exercise Price (in Dollars per share)	$ 7.00

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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