Stockholders' Equity (Details) (USD $)	3 Months Ended				9 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Beginning balance, value	$ 23,895,725	$ 24,014,613	$ 24,764,671		$ 24,764,671
Beginning balance, shares	36,864,358	36,669,509	36,664,097		36,664,097
Issuance of common stock under employee stock purchase plan, value	17,837	18,029	3,572
Issuance of common stock under employee stock purchase plan, shares	14,502	28,618	5,412
Issuance of common stock under stock bonus plan, value	11,387	36,499
Issuance of common stock under stock bonus plan, shares	12,794	166,231
Compensation expense from employee and director stock option and common stock grants	172,640	238,853	162,724
Net loss	(65,913)	(412,269)	(916,354)	(4,555,033)	(1,394,536)	(8,406,015)
Ending balance, value	24,031,676	23,895,725	24,014,613		24,031,676
Ending balance, shares	36,891,654	36,864,358	36,669,509		36,891,654
Common Stock [Member]
Class of Stock [Line Items]
Beginning balance, value	368,644	366,695	366,641		366,641
Issuance of common stock under employee stock purchase plan, value	145	286	54
Issuance of common stock under stock bonus plan, value	128	1,663
Ending balance, value	368,917	368,644	366,695		368,917
Additional Paid-in Capital [Member]
Class of Stock [Line Items]
Beginning balance, value	116,031,005	115,739,573	115,573,331		115,573,331
Issuance of common stock under employee stock purchase plan, value	17,692	17,743	3,518
Issuance of common stock under stock bonus plan, value	11,259	34,836
Compensation expense from employee and director stock option and common stock grants	172,640	238,853	162,724
Ending balance, value	116,232,596	116,031,005	115,739,573		116,232,596
Accumulated Deficit [Member]
Class of Stock [Line Items]
Beginning balance, value	(92,503,924)	(92,091,655)	(91,175,301)		(91,175,301)
Net loss	(65,913)	(412,269)	(916,354)
Ending balance, value	$ (92,569,837)	$ (92,503,924)	$ (92,091,655)		$ (92,569,837)