Materion Corporation and Subsidiaries Schedule II—Valuation and Qualifying Accounts Years Ended December 31, 2018, 2017, and 2016 | | | | | | | | | | | | | | | | | | | | | | Column A | | Column B | | Column C | | Column D | | Column E | (Thousands) | | Balance at Beginning of Period | | ADDITIONS | | Deduction | | Balance at End of Period | |
Charged to Costs and Expenses | |
Charged to Other Accounts | | Year ended December 31, 2018 | | | | | | | | | | | Deducted from asset accounts: | | | | | | | | | | | Allowance for doubtful accounts receivable | | $ | 640 |
| | $ | 271 |
| | $ | — |
| | $ | 295 |
| (A) | $ | 616 |
| Inventory reserves and obsolescence | | 13,176 |
| | 3,341 |
| | — |
| | 4,491 |
| (B) | 12,026 |
| Year ended December 31, 2017 | | | | | | | | | | | Deducted from asset accounts: | | | | | | | | | | | Allowance for doubtful accounts receivable | | $ | 857 |
| | $ | 84 |
| | $ | — |
| | $ | 301 |
| (A) | $ | 640 |
| Inventory reserves and obsolescence | | 14,407 |
| | 3,521 |
| | — |
| | 4,752 |
| (B) | 13,176 |
| Year ended December 31, 2016 | | | | | | | | | | | Deducted from asset accounts: | | | | | | | | | | | Allowance for doubtful accounts receivable | | $ | 1,197 |
| | $ | (34 | ) | | $ | — |
| | $ | 306 |
| (A) | $ | 857 |
| Inventory reserves and obsolescence | | 7,869 |
| | 10,564 |
| | — |
| | 4,026 |
| (B) | 14,407 |
|
Note (A) - Bad debts written-off, net of recoveries Note (B) - Inventory write-off
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