Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2012

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following:

	December 31, 2012		December 31, 2011
Equipment maintenance and services		747,273		424,328
Prepaid insurance		365,167		251,418
Interest receivable		140,363		106,695
Clinical and research expenses		15,354		13,714
Other		36,730		82,304
Total	$	1,304,887	$	878,459