Share-based Compensation (Details) (USD $) | 6 Months Ended | | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | | 6 Months Ended |
Sep. 30, 2013 | Sep. 30, 2012 | Mar. 31, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Mar. 31, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Mar. 31, 2013 | Jul. 23, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 |
Minimum [Member] | Maximum [Member] | Stock Options [Member] | Stock Options [Member] | Stock Options [Member] | Stock Options [Member] | Stock Options [Member] | Restricted Stock [Member] | Restricted Stock [Member] | Stock Compensation Plan [Member] | 2006 Amended Stock and Incentive Plan [Member] | 2006 Amended Stock and Incentive Plan [Member] | 2006 Amended Stock and Incentive Plan [Member] |
| | | | | Maximum [Member] | Consultants [Member] | | | New Chief Executive [Member] | Plan | Stock Options [Member] | Stock Options [Member] |
| | | | | | | | | | | Minimum [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) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 3,450,000 | ' | ' |
Additional shares approved for share-based grants (in shares) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 750,000 | ' | ' |
Stock grants (in shares) | 21,467,390 | ' | 21,005,582 | ' | ' | ' | ' | ' | ' | ' | ' | ' | 300,000 | ' | ' | ' |
Shares available for grant (in shares) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 834,467 | ' | ' |
Term of share-based payment award (in years) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | '5 years | '7 years |
Vesting period | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | '3 years |
Share-based compensation and consulting expense | $921,000 | $355,000 | ' | ' | ' | ' | ' | ' | ' | $2,000 | ' | ' | ' | ' | ' | ' |
Weighted-average assumptions used to value the options granted [Abstract] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Expected life in years | ' | ' | ' | ' | ' | '4 years 6 months 4 days | '5 years 7 months 2 days | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Risk free interest rate (in hundredths) | ' | ' | ' | ' | ' | 1.35% | 0.95% | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Expected volatility (in hundredths) | ' | ' | ' | ' | ' | 89.43% | 91.16% | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Expected dividend yield (in hundredths) | ' | ' | ' | ' | ' | 0.00% | 0.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Weighted-average grant date fair value (in dollars per share) | ' | ' | ' | ' | ' | $1.65 | $2.61 | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Forfeiture rate (in hundredths) | ' | ' | ' | ' | ' | ' | ' | ' | 6.30% | ' | ' | ' | ' | ' | ' | ' |
Stock options, number of shares [Roll Forward] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Outstanding, beginning of period (in shares) | ' | ' | ' | ' | ' | 2,015,889 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Options granted (in shares) | ' | ' | ' | ' | ' | 855,125 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Options exercised (in shares) | ' | ' | ' | ' | ' | -130,132 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Options surrendered (in shares) | ' | ' | ' | ' | ' | -260,199 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Outstanding, end of period (in shares) | ' | ' | ' | ' | ' | 2,480,683 | ' | 2,015,889 | ' | ' | ' | ' | ' | ' | ' | ' |
Exercisable, end of period (in shares) | ' | ' | ' | ' | ' | 1,455,279 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Stock options, weighted average exercise price [Roll Forward] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Outstanding, beginning of period (in dollars per share) | ' | ' | ' | ' | ' | $3.51 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Options granted (in dollars per share) | ' | ' | ' | ' | ' | $2.47 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Options exercised (in dollars per share) | ' | ' | ' | ' | ' | $0.88 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Options surrendered (in dollars per share) | ' | ' | ' | ' | ' | $3.76 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Outstanding, end of period (in dollars per share) | ' | ' | ' | ' | ' | $3.26 | ' | $3.51 | ' | ' | ' | ' | ' | ' | ' | ' |
Exercisable, end of period (in dollars per share) | ' | ' | ' | ' | ' | $3.69 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Stock options, additional disclosures [Abstract] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Outstanding, aggregate intrinsic value, end of period | ' | ' | ' | ' | ' | 1,657 | ' | 598 | ' | ' | ' | ' | ' | ' | ' | ' |
Exercisable, aggregate intrinsic value, end of period | ' | ' | ' | ' | ' | 859 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Outstanding, weighted average remaining life in years | ' | ' | ' | ' | ' | '3 years 10 months 28 days | ' | '2 years 7 months 20 days | ' | ' | ' | ' | ' | ' | ' | ' |
Exercisable, Weighted average remaining life in years | ' | ' | ' | ' | ' | '1 year 11 months 23 days | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Fair value of stock options vested | ' | ' | ' | ' | ' | 315,000 | 386,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Forfeiture risk, expiration period | ' | ' | ' | '3 years | '4 years | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Restricted shares, number of shares [Roll Forward] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Balance, beginning of period (in shares) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 180,085 | ' | ' | ' | ' | ' |
Shares granted (in shares) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 121,750 | ' | ' | ' | ' | ' |
Shares vested (in shares) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -29,197 | ' | ' | ' | ' | ' |
Shares forfeited (in shares) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -90,074 | ' | ' | ' | ' | ' |
Balance, end of period (in shares) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 182,564 | 180,085 | ' | ' | ' | ' |
Restricted shares, weighted average grant date fair value [Roll Forward] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Balance, beginning of period (in dollars per share) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $4.39 | ' | ' | ' | ' | ' |
Shares granted (in dollars per share) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $3.06 | ' | ' | ' | ' | ' |
Shares vested (in dollars per share) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $4.71 | ' | ' | ' | ' | ' |
Shares forfeited (in dollars per share) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $4.38 | ' | ' | ' | ' | ' |
Balance, end of period (in dollars per share) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $3.45 | $4.39 | ' | ' | ' | ' |
Restricted shares, additional disclosures [Abstract] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Weighted average remaining life in years | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | '2 years 5 months 12 days | '1 year 6 months | ' | ' | ' | ' |
Outstanding, Aggregate intrinsic value | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 630 | 790 | ' | ' | ' | ' |
Unrecognized share-based compensation expense | $2,137,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Unrecognized compensation expense, weighted average period of recognition | '2 years 7 months 6 days | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |