Shareholders' Equity (Details) (USD $)	12 Months Ended						12 Months Ended			0 Months Ended	12 Months Ended													12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2011 Warrants [Member]	Mar. 31, 2013 Warrants [Member]	Mar. 31, 2012 Warrants [Member]	Mar. 31, 2013 Stock Options [Member]	Mar. 31, 2012 Stock Options [Member]	Mar. 31, 2011 Stock Options [Member]	Jul. 23, 2013 Stock Options [Member] New Chief Executive [Member]	Mar. 31, 2013 Stock Options [Member] Minimum [Member]	Mar. 31, 2013 Stock Options [Member] Maximum [Member]	Mar. 31, 2013 Stock Options [Member] Consultants [Member]	Mar. 31, 2012 Stock Options [Member] Consultants [Member]	Mar. 31, 2011 Stock Options [Member] Consultants [Member]	Mar. 31, 2013 Restricted Stock [Member]	Mar. 31, 2012 Restricted Stock [Member]	Mar. 31, 2011 Restricted Stock [Member]	Mar. 31, 2013 Restricted Stock [Member] Minimum [Member]	Mar. 31, 2013 Restricted Stock [Member] Maximum [Member]	Jul. 23, 2013 Stock Compensation Plan [Member] New Chief Executive [Member]	Jul. 23, 2013 2006 Amended Stock and Incentive Plan [Member]	Mar. 31, 2013 2006 Amended Stock and Incentive Plan [Member] Plan	Mar. 31, 2013 2006 Amended Stock and Incentive Plan [Member] Stock Options [Member]	Mar. 31, 2013 2006 Amended Stock and Incentive Plan [Member] Stock Options [Member] Minimum [Member]	Mar. 31, 2013 2006 Amended Stock and Incentive Plan [Member] Stock Options [Member] Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of active plans for share-based compensation grants																							1
Number of shares reserved for share-based grants (in shares)																							2,700,000
Stock grants	21,005,582	20,808,532																			300,000
Shares available for grant (in shares)																						295,000	1,011,000
Term of share-based payment award (in years)	10 years																								5 years	7 years
Vesting period																			6 months	4 years				3 years
Fully vested options outstanding (in shares)	900,000
Share-based compensation and consulting expense	$ 812,000	$ 685,000	$ 434,000										$ 2,000	$ 5,000	$ 11,000
Weighted-average assumptions used to value the options granted [Abstract]
Expected life, in years							6 years	5 years 3 months 26 days	5 years 3 months
Risk-free interest rate (in hundredths)							1.15%	1.57%	1.76%
Expected volatility (in hundredths)							89.03%	90.08%	91.13%
Expected dividend yield (in hundredths)							0.00%	0.00%	0.00%
Forfeiture rate (in hundredths)											0.00%	13.00%
Stock options, number of shares [Roll Forward]
Outstanding, beginning of period (in shares)							2,083,000	2,066,000	2,038,000														1,116,000
Options granted (in shares)							188,000	140,000	229,000	700,000
Options exercised (in shares)							(40,000)	(94,000)	(161,000)
Options surrendered (in shares)							(215,000)	(29,000)	(40,000)
Outstanding, end of period (in shares)							2,016,000	2,083,000	2,066,000														1,116,000
Exercisable, end of period (in shares)							1,723,000
Stock options, weighted average exercise price [Roll Forward]
Outstanding, beginning of period (in dollars per share)							$ 3.64	$ 3.39
Options granted (in dollars per share)							$ 3.09	$ 6.66
Options exercised (in dollars per share)							$ 3.75	$ 2.22
Options surrendered (in dollars per share)							$ 4.36	$ 5.36
Outstanding, end of period (in dollars per share)							$ 3.51	$ 3.64	$ 3.39
Exercisable, end of period (in dollars per share)							$ 3.38
Stock options, additional disclosures [Abstract]
Weighted-average grant date fair value (in dollars per share)							$ 2.26	$ 4.70	$ 3.49
Options exercised, Aggregate intrinsic value							18,000	430,000	502,000
Outstanding, Aggregate intrinsic value, end of period							598,000	968,000
Exercisable, Aggregate intrinsic value, end of period							598,000
Outstanding, Weighted average remaining life in years							2 years 7 months 21 days	2 years 11 months 16 days
Exercisable, Weighted average remaining life in years							2 years 26 days
Fair value of stock options vested							490,000	398,000	221,000
Proceeds from stock options exercised							150,000
Restricted shares and warrants, number of shares [Roll Forward]
Balance, beginning of period (in shares)																70,000	55,000	0
Shares granted (in shares)																167,000	50,000	73,000
Shares vested (in shares)																(47,000)	(35,000)	(18,000)
Shares surrendered (in shares)																(10,000)
Balance, end of period (in shares)																180,000	70,000	55,000
Restricted shares, weighted average grant date fair value [Roll Forward]
Balance, beginning of period (in dollars per share)																$ 6.30	$ 4.96
Shares granted (in dollars per share)																$ 3.61	$ 6.80	$ 4.76
Shares vested (in dollars per share)																$ 4.76	$ 4.91
Shares surrendered (in dollars per share)																$ 3.21
Balance, end of period (in dollars per share)																$ 4.39	$ 6.30	$ 4.96
Restricted shares and warrants, additional disclosures [Abstract]
Weighted average remaining life in years																1 year 6 months	11 months 12 days
Shares vested, Aggregate intrinsic value																225,000	170,000	75,000
Balance, end of period																790,000	443,000
Unrecognized share-based compensation expense	1,174,000
Unrecognized compensation expense, weighted average period of recognition	2 years
Class of Warrant or Right [Line Items]
Outstanding at beginning of period (in shares)				2,067,000	0	0
Warrants expired (in shares)				(1,181,000)
Warrants exercised (in shares)				(886,000)
Outstanding at end of period (in shares)				0	0	0
Warrants exercised, Weighted average exercise price (in dollars per share)				$ 2.49
Proceeds from exercise of warrants				$ 2,200,000