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Schedule II — Valuation and Qualifying Accounts | 12 Months Ended
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Mar. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Schedule II — Valuation and Qualifying Accounts | American Superconductor Corporation Schedule II — Valuation and Qualifying Accounts (In thousands)
| Balance, Beginning of Year |  | Additions |  | Write-offs |  | Recoveries and Other Adjustments |  | Balance, End of Year
Allowance for doubtful accounts receivable: |  |  |  |  |  |  |  |  |
Fiscal year ended March 31, 2017 | $ | 54 |  |  | — |  |  | — |  |  | — |  |  | $ | 54 |
Fiscal year ended March 31, 2016 | $ | 54 |  |  | — |  |  | — |  |  | — |  |  | $ | 54 |
Fiscal year ended March 31, 2015 | $ | 16 |  |  | 54 |  |  | (16 | ) |  | — |  |  | $ | 54 |
| Balance, Beginning of Year |  | Additions |  | Write-offs |  | Recoveries and Other Adjustments |  | Balance, End of Year
Deferred tax asset valuation allowance: |  |  |  |  |  |  |  |  |
Fiscal year ended March 31, 2017 | $ | 301,393 |  |  | 22,580 |  |  | (8,881 | ) |  | — |  |  | $ | 315,092 |
Fiscal year ended March 31, 2016 | $ | 294,860 |  |  | 9,028 |  |  | (2,495 | ) |  | — |  |  | $ | 301,393 |
Fiscal year ended March 31, 2015 | $ | 282,824 |  |  | 15,189 |  |  | (3,153 | ) |  | — |  |  | $ | 294,860 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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