Stockholders' Equity (Details) (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Class of Stock [Line Items]
Beginning balance, value	$ 24,764,671
Beginning balance, shares	36,664,097
Issuance of common stock under employee stock purchase plan, value	3,572
Issuance of common stock under employee stock purchase plan, shares	5,412
Compensation expense from employee and director stock option and common stock grants	162,724
Net loss	(916,354)	(1,287,434)
Ending balance, value	24,014,613
Ending balance, shares	36,669,509
Common Stock [Member]
Class of Stock [Line Items]
Beginning balance, value	366,641
Issuance of common stock under employee stock purchase plan, value	54
Ending balance, value	366,695
Additional Paid-in Capital [Member]
Class of Stock [Line Items]
Beginning balance, value	115,573,331
Issuance of common stock under employee stock purchase plan, value	3,518
Compensation expense from employee and director stock option and common stock grants	162,724
Ending balance, value	115,739,573
Accumulated Deficit [Member]
Class of Stock [Line Items]
Beginning balance, value	(91,175,301)
Net loss	(916,354)
Ending balance, value	$ (92,091,655)