FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2012

Dec. 31, 2011

FAIR VALUE MEASUREMENTS

Schedule of financial assets and liabilities recorded at fair value on a recurring basis

Description	September 30, 2012 Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market fund	$	36,957,469		—	$	36,957,469		—
Total assets	$	36,957,469		—	$	36,957,469		—
Liabilities:
2013 Notes		7,593,216		—		7,593,216		—
Total liabilities	$	7,593,216		—	$	7,593,216		—

Description	December 31, 2011 Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market fund	$	55,465,507		—	$	55,465,507		—
Total assets	$	55,465,507		—	$	55,465,507		—
Liabilities:
2013 Notes	$	17,336,760		—	$	17,336,760		—
Total liabilities	$	17,336,760		—	$	17,336,760		—

Description	December 31, 2010 Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market fund	$	21,729,230		—	$	21,729,230		—
Total assets	$	21,729,230		—	$	21,729,230		—
Liabilities:
2011 Notes	$	1,111,132		—	$	1,111,132		—
2013 Notes		17,436,201		—		17,436,201		—
Total liabilities	$	18,547,333		—	$	18,547,333		—