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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Mar. 31, 2018
Valuation And Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts | GRAHAM CORPORATION AND SUBSIDIARIES SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (In Thousands)
|  | Balance at |  |  | Charged to |  |  | Charged to |  |  |  |  |  |  | Balance at |
|  | Beginning |  |  | Costs and |  |  | Other |  |  |  |  |  |  | End of |
Description |  | of Period |  |  | Expenses |  |  | Accounts |  |  | Deductions |  |  | Period |
Year ended March 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserves deducted from the asset to which they apply: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserve for doubtful accounts receivable |  | $ | 168 |  |  | $ | 177 |  |  | $ | — |  |  | $ | (6 | ) |  | $ | 339 |
Reserves included in the balance sheet caption "accrued expenses" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product warranty liability |  | $ | 538 |  |  | $ | 527 |  |  | $ | — |  |  | $ | (572 | ) |  | $ | 493 |
Reserves included in the balance sheet caption "accrued compensation" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring reserve |  | $ | 120 |  |  | $ | 316 |  |  | $ | — |  |  | $ | (418 | ) |  | $ | 18 |
Year ended March 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserves deducted from the asset to which they apply: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserve for doubtful accounts receivable |  | $ | 91 |  |  | $ | 91 |  |  | $ | — |  |  | $ | (14 | ) |  | $ | 168 |
Reserves included in the balance sheet caption "accrued expenses" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product warranty liability |  | $ | 686 |  |  | $ | 106 |  |  | $ | — |  |  | $ | (254 | ) |  | $ | 538 |
Reserves included in the balance sheet caption "accrued compensation" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring reserve |  | $ | 74 |  |  | $ | 630 |  |  | $ | — |  |  | $ | (584 | ) |  | $ | 120 |
Year ended March 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserves deducted from the asset to which they apply: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserve for doubtful accounts receivable |  | $ | 62 |  |  | $ | 38 |  |  | $ | — |  |  | $ | (9 | ) |  | $ | 91 |
Reserves included in the balance sheet caption "accrued expenses" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product warranty liability |  | $ | 653 |  |  | $ | 336 |  |  | $ | — |  |  | $ | (303 | ) |  | $ | 686 |
Reserves included in the balance sheet caption "accrued compensation" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring reserve |  | $ | 1,718 |  |  | $ | (3 | ) |  | $ | — |  |  | $ | (1,641 | ) |  | $ | 74 |

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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 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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