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Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data | Common Stock [Member] | Additional Paid-In Capital [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Deficit [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Mar. 31, 2010 | $ 448 | $ 698,417 |  | $ (7,011) | $ (410,889) | $ 280,965
Balance, shares at Mar. 31, 2010 | 44,846,000 |  |  |  |  |
Exercise of stock options | 6 | 7,198 |  |  |  | 7,204
Exercise of stock options, shares | 567,000 |  |  |  |  |
Issuance of common stock - ESPP |  | 614 |  |  |  | 614
Issuance of common stock - ESPP, shares | 26,000 |  |  |  |  |
Issuance of common stock - restricted shares | 3 | (3) |  |  |  |
Issuance of common stock - restricted shares, shares | 301,000 |  |  |  |  |
Stock-based compensation expense |  | 13,412 |  |  |  | 13,412
Non-employee stock-based compensation expense |  | 31 |  |  |  | 31
Issuance of stock for calendar 401(k) match |  | 841 |  |  |  | 841
Issuance of stock for calendar 401(k) match, shares | 29,000 |  |  |  |  |
Issuance of common stock- follow-on public offering, net of costs | 46 | 155,194 |  |  |  | 155,240
Issuance of common stock- follow-on public offering, net of costs, shares | 4,600,000 |  |  |  |  |
Contingent consideration | 4 | 10,000 |  |  |  | 10,004
Contingent consideration shares | 350,000 |  |  |  |  |
Net unrealized losses on investments |  |  |  | (90) |  | (90)
Cumulative translation adjustment |  |  |  | 10,918 |  | 10,918
Net loss |  |  |  |  | (186,284) | (186,284)
Balance at Mar. 31, 2011 | 507 | 885,704 |  | 3,817 | (597,173) | 292,855
Balance, shares at Mar. 31, 2011 | 50,719,000 |  |  |  |  |
Exercise of stock options |  | 24 |  |  |  | 24
Exercise of stock options, shares | 3,000 |  |  |  |  |
Issuance of common stock - ESPP | 1 | 303 |  |  |  | 304
Issuance of common stock - ESPP, shares | 89,000 |  |  |  |  |
Issuance of common stock - restricted shares | 7 | (7) |  |  |  |
Issuance of common stock - restricted shares, shares | 698,000 |  |  |  |  |
Stock-based compensation expense |  | 9,864 |  |  |  | 9,864
Issuance of stock for calendar 401(k) match | 1 | 719 |  |  |  | 720
Issuance of stock for calendar 401(k) match, shares | 127,000 |  |  |  |  |
Contingent consideration | 4 | (4) |  |  |  |
Contingent consideration shares | 350,000 |  |  |  |  |
Treasury stock, at cost |  |  | 271 |  |  | 271
Cumulative translation adjustment |  |  |  | (1,790) |  | (1,790)
Net loss |  |  |  |  | (136,827) | (136,827)
Balance at Mar. 31, 2012 | 520 | 896,603 | (271) | 2,027 | (734,000) | 164,879
Balance, shares at Mar. 31, 2012 | 51,986,000 |  |  |  |  | 51,962,141
Exercise of stock options |  | 2 |  |  |  | 2
Exercise of stock options, shares |  |  |  |  |  | 480
Issuance of common stock - ESPP | 1 | 289 |  |  |  | 290
Issuance of common stock - ESPP, shares | 100,000 |  |  |  |  |
Issuance of common stock - restricted shares | 25 | 1,594 |  |  |  | 1,619
Issuance of common stock - restricted shares, shares | 2,463,000 |  |  |  |  |
Stock-based compensation expense |  | 8,138 |  |  |  | 8,138
Issuance of stock for calendar 401(k) match | 2 | 537 |  |  |  | 539
Issuance of stock for calendar 401(k) match, shares | 158,000 |  |  |  |  |
Issuance of common stock to settle liabilities | 55 | 16,684 |  |  |  | 16,739
Issuance of common stock to settle liabilities, shares | 5,593,000 |  |  |  |  |
Treasury stock, at cost |  |  | 42 |  |  | 42
Net unrealized losses on investments |  |  |  | (28) |  | (28)
Cumulative translation adjustment |  |  |  | (887) |  | (887)
Net loss |  |  |  |  | (66,131) | (66,131)
Balance at Mar. 31, 2013 | $ 603 | $ 923,847 | $ (313) | $ 1,112 | $ (800,131) | $ 125,118
Balance, shares at Mar. 31, 2013 | 60,300,000 |  |  |  |  | 60,300,466

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