Fair Value Measurements (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Certificates Of Deposit, At Fair Value Value	$ 3,642,944	$ 3,605,658
Accretion Expense	48,972
Cash and Cash Equivalents [Member]
Certificates Of Deposit, At Fair Value Value	405,709	405,294
Short-Term Investments [Member]
Certificates Of Deposit, At Fair Value Value	2,135,709	2,128,380
Long Term Investments [Member]
Certificates Of Deposit, At Fair Value Value	$ 1,101,526	$ 1,071,984