- Definition

Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References+ Details

Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Money Market Funds, at Carrying Value	$ 250,313
Advertising Expense	4,047	7,359	7,783
Securities Investor Protection Corporation [Member]
Limit For Investment In Mutual Funds	$ 500,000
Building [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
Building [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	8 years
Equipment and Land Improvement [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	20 years
Equipment and Land Improvement [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years