Stock-Based Compensation (Schedule of Warrants Outstanding and Exercisable) (Details) (Warrant [Member], USD $)	12 Months Ended
Mar. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding	61,194,343
Number Exercisable	60,297,010
$ 0.19 - $ 0.20 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum	$ 0.19
Exercise Price, maximum	$ 0.20
Number Outstanding	2,437,574
Weighted-Average Remaining Contractual Life (Years)	4 years 3 months 18 days
Weighted-Average Exercise Price	$ 0.20
Number Exercisable	2,437,574
Weighted-Average Exercise Price	$ 0.20
$ 0.21 - $ 0.37 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum	$ 0.21
Exercise Price, maximum	$ 0.37
Number Outstanding	20,980,838
Weighted-Average Remaining Contractual Life (Years)	4 years 6 months
Weighted-Average Exercise Price	$ 0.37
Number Exercisable	20,980,838
Weighted-Average Exercise Price	$ 0.37
$ 0.38 - $ 0.69 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum	$ 0.38
Exercise Price, maximum	$ 0.69
Number Outstanding	10,932,429
Weighted-Average Remaining Contractual Life (Years)	3 years
Weighted-Average Exercise Price	$ 0.67
Number Exercisable	10,035,929
Weighted-Average Exercise Price	$ 0.69
$ 0.70 - $ 0.92 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum	$ 0.70
Exercise Price, maximum	$ 0.92
Number Outstanding	21,431,557
Weighted-Average Remaining Contractual Life (Years)	1 year 8 months 12 days
Weighted-Average Exercise Price	$ 0.77
Number Exercisable	21,431,557
Weighted-Average Exercise Price	$ 0.77
$ 0.93 - $ 10.80 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum	$ 0.93
Exercise Price, maximum	$ 10.80
Number Outstanding	5,411,945
Weighted-Average Remaining Contractual Life (Years)	10 months 24 days
Weighted-Average Exercise Price	$ 3.53
Number Exercisable	5,411,112
Weighted-Average Exercise Price	$ 3.53

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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