Stock Options and Equity Compensation Plan (Details Textuals 1) (Stock options, USD $)	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based employee compensation expense	$ 413,000
Unrecognized compensation cost weighted average recognition period	3 years 8 months 1 day
Number of options granted to purchase shares of common stock	21,000	21,000

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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

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