FAIR VALUE MEASUREMENTS (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Assets:
Restricted cash	$ 2,260,100
Recurring basis
Assets:
Restricted cash	2,260,100
Recurring basis | Total
Assets:
Total Assets	30,712,414	34,210,555
Liabilities:
Total liabilities	8,169,215	7,883,886
Recurring basis | Total | 2013 Notes
Liabilities:
Fair value of convertible debt	8,169,215	7,883,886
Recurring basis | Total | Money market fund
Assets:
Total Assets	28,452,314	34,210,555
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Restricted cash	2,260,100
Total Assets	30,712,414	34,210,555
Liabilities:
Total liabilities	8,169,215	7,883,886
Recurring basis | Significant Other Observable Inputs (Level 2) | 2013 Notes
Liabilities:
Fair value of convertible debt	8,169,215	7,883,886
Recurring basis | Significant Other Observable Inputs (Level 2) | Money market fund
Assets:
Total Assets	$ 28,452,314	$ 34,210,555