|
Investment in Unconsolidated Affiliate (Details) (Sequel Power [Member], USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Jan. 14, 2011
|
Mar. 31, 2013
|
Mar. 31, 2012
|
|
|
Sequel Power [Member]
|
|||
| Schedule of Equity Method Investments [Line Items] | |||
| Equity investment | $ 2 | ||
| Ownership interest (in hundredths) | 25.00% | ||
| Number of warrants (in shares) | 185,777 | ||
| Exercise price of warrants (in dollars per share) | $ 3.15 | ||
| Term of awards | 4 years | ||
| Warrants cancelled (in shares) | 44,578 | 48,310 | |
| X | ||||||||||
|
- Definition
The term of the share-based award. No definition available.
|
| X | ||||||||||
|
- Definition
The number warrants forfeited and cancelled during the period. No definition available.
|
| X | ||||||||||
|
- Definition
The exercise price of each class of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The specified number of securities that each class of warrants or rights outstanding give the holder the right but not the obligation to purchase from the issuer at a specific price, on or before a certain date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the aggregate cost of investments accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|