| Capital Stock Transactions - Warrants (Details) - Warrant liability | 12 Months Ended | 
|---|---|
| Mar. 31, 2017  $ / shares  shares | |
| Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] | |
| Outstanding (shares) | shares | 2,085,356,000 | 
| Issued (shares) | shares | 4,385,600,000 | 
| Expired (shares) | shares | (1,467,143,000) | 
| Outstanding (shares) | shares | 5,003,813,000 | 
| Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward] | |
| Outstanding ($ per share) | $ / shares | $ 2,780.00 | 
| Issued ($ per share) | $ / shares | 1,360.00 | 
| Expired ($ per share) | $ / shares | 2,490.00 | 
| Outstanding ($ per share) | $ / shares | $ 1,620.00 | 
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Expirations in Period, Weighted Average Exercise Price No definition available. 
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Grants in Period, Weighted Average Exercise Price No definition available. 
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price No definition available. 
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward] No definition available. 
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- Definition Number of shares under non-option equity instrument agreements for which rights to exercise lapsed. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Net number of non-option equity instruments granted to participants. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available. 
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- Details 
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