Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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+ Details

LIQUIDITY AND CAPITAL RESOURCES (Details) (USD $)					3 Months Ended
LIQUIDITY AND CAPITAL RESOURCES (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 Minimum item	Mar. 31, 2013 Maximum	Mar. 31, 2013 2013 Notes	Dec. 31, 2012 2013 Notes
Liquidity and capital resources
Cash and cash equivalents	$ 29,388,772	$ 34,794,341	$ 49,473,732	$ 57,225,234
Principal amount							$ 8,277,850	$ 8,277,850
Interest rate (as a percent)							3.125%
Number of Company products or technologies which may be licensed to a third party					1
Period for which cash and cash equivalents will meet liquidity requirements					3 years	5 years