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Computation Of Net (Loss) Income Per Common Share (Tables) | 9 Months Ended
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Dec. 31, 2012
Computation Of Net (Loss) Income Per Common Share [Abstract] |
Reconciliation Of Numerators And Denominators Of EPS Calculation |
|  | Three months ended |  |  | Nine months ended
|  | December 31, |  |  | December 31,
|  | 2012 |  | 2011 |  |  | 2012 |  | 2011
Numerator: |  |  |  |  |  |  |  |  |
Net loss | $ | (20,135) | $ | (26,271) |  | $ | (46,360) | $ | (115,660)
Denominator: |  |  |  |  |  |  |  |  |
Weighted-average shares of common stock outstanding |  | 53,745 |  | 51,459 |  |  | 52,558 |  | 51,120
Weighted-average shares subject to repurchase |  | (953) |  | (526) |  |  | (592) |  | (331)
Shares used in per-share calculation ― basic |  | 52,792 |  | 50,933 |  |  | 51,966 |  | 50,789
Shares used in per-share calculation ― diluted |  | 52,792 |  | 50,933 |  |  | 51,966 |  | 50,789
Net loss per share ― basic | $ | (0.38) | $ | (0.52) |  | $ | (0.89) | $ | (2.28)
Net loss per share ― diluted | $ | (0.38) | $ | (0.52) |  | $ | (0.89) | $ | (2.28)

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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