Accrued Expenses and Other Current Liabilities

9 Months Ended

Sep. 30, 2011

Accrued Expenses and Other Current Liabilities [Abstract]

Accrued Expenses and Other Current Liabilities

Note 10. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consist of the following:

	September 30,		December 31,
	2011		2010
Accrued payroll and other employee costs	$	5,413,767	$	4,152,833
Accrued material purchases		1,559,812		255,679
Accrued interest payable on convertible senior notes		1,467,448		209,635
Accrued research and development costs		800,762		671,928
Accrued professional fees		800,261		577,237
Accrued VAT		566,121		647,525
Other accrued expenses		629,545		486,513
	$	11,237,716	$	7,001,350

Accrued payroll and other employee costs included estimated year-end employee bonuses of approximately $3.2 million and $3.1 million at September 30, 2011 and December 31, 2010, respectively.