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Stockholders' Equity (Tables) | 12 Months Ended
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Mar. 31, 2013
Stockholders' Equity [Abstract] |
Components Of Employee Stock-Based Compensation |
|  | For the Years Ended March 31,
|  | 2013 |  | 2012 |  | 2011
Stock options | $ | 3,389 | $ | 6,177 | $ | 6,374
Restricted stock and stock awards |  | 4,698 |  | 3,633 |  | 6,919
Employee stock purchase plan |  | 51 |  | 54 |  | 119
Total stock-based compensation expense | $ | 8,138 | $ | 9,864 | $ | 13,412
Summary Of Employee Stock-Based Compensation Expense By Financial Statement Line Item |
| For the Years Ended March 31,
|  | 2013 |  | 2012 |  | 2011
Cost of revenues | $ | 726 | $ | 1,121 | $ | 1,188
Research and development |  | 2,456 |  | 2,562 |  | 1,977
Selling, general and administrative |  | 4,956 |  | 6,181 |  | 10,247
Total | $ | 8,138 | $ | 9,864 | $ | 13,412
Summary Of Employee And Non-Employee Stock Options Activity |
|  |  |  | Weighted- |  |
|  |  | Weighted- | Average |  |
|  |  | Average | Remaining |  | Aggregate
| Options/ |  | Exercise | Contractual |  | Intrinsic Value
| Shares |  | Price | Term |  | (thousands)
Outstanding at March 31, 2012 | 2,290,416 | $ | 17.77 |  |  |
Granted at fair value | 857,450 |  | 4.09 |  |  |
Exercised | (480) |  | 3.44 |  |  |
Cancelled/forfeited | (476,192) |  | 15.57 |  |  |
Outstanding at March 31, 2013 | 2,671,194 | $ | 13.77 | 6.4 | $ | 0
Exercisable at March 31, 2013 | 1,443,185 | $ | 16.65 | 4.6 | $ | 0
Fully vested and expected to vest at March 31, 2013 | 2,577,218 | $ | 13.88 | 6.3 | $ | 0
Schedule Of Weighted Average Assumptions Used In The Black-Scholes Valuation Model For Stock Options Granted |
| For the Years Ended March 31, |
| 2013 |  | 2012 |  | 2011 |
Expected volatility | 72.0 | % | 70.0 | % | 64.2 | %
Risk-free interest rate | 0.9 | % | 1.8 | % | 2.2 | %
Expected life (years) | 5.9 |  | 5.9 |  | 5.8 |
Dividend yield | None |  | None |  | None |
Summary Of The Employee And Non-Employee Restricted Stock Activity |
|  |  | Weighted |  | Intrinsic
|  |  | Average |  | Aggregate
|  |  | Grant Date |  | Value
| Shares |  | Fair Value |  | (thousands)
Outstanding at April 1, 2012 | 929,489 | $ | 10.00 |  |
Granted | 3,126,749 |  | 3.48 |  |
Vested | (1,004,920) |  | 7.37 |  |
Forfeited | (646,493) |  | 4.76 |  |
Outstanding at March 31, 2013 | 2,404,825 | $ | 4.58 | $ | 6,421

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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