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Inventory | 12 Months Ended
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Mar. 31, 2018
Inventory [Abstract] |
Inventory | 7. Inventory Non-core inventory, inventory unreturned, long-term core inventory, and long-term core inventory deposits are as follows at March 31:
|  | 2018 |  |  | 2017 |
Non-core inventory |  |  |  |  |  |
Raw materials |  | $ | 25,805,000 |  |  | $ | 21,515,000 |
Work in process |  |  | 635,000 |  |  |  | 641,000 |
Finished goods |  |  | 53,973,000 |  |  |  | 48,337,000 |
|  |  | 80,413,000 |  |  |  | 70,493,000 |
Less allowance for excess and obsolete inventory |  |  | (4,138,000 | ) |  |  | (2,977,000 | )
Total |  | $ | 76,275,000 |  |  | $ | 67,516,000 |
Inventory unreturned |  | $ | 7,508,000 |  |  | $ | 7,581,000 |
Long-term core inventory |  |  |  |  |  |  |  |
Used cores held at the Company's facilities |  | $ | 53,278,000 |  |  | $ | 38,713,000 |
Used cores expected to be returned by customers |  |  | 12,970,000 |  |  |  | 11,752,000 |
Remanufactured cores held in finished goods |  |  | 34,201,000 |  |  |  | 27,667,000 |
Remanufactured cores held at customers' locations (1) |  |  | 203,751,000 |  |  |  | 185,938,000 |
|  |  | 304,200,000 |  |  |  | 264,070,000 |
Less allowance for excess and obsolete inventory |  |  | (2,544,000 | ) |  |  | (1,148,000 | )
Total |  | $ | 301,656,000 |  |  | $ | 262,922,000 |
Long-term core inventory deposits |  | $ | 5,569,000 |  |  | $ | 5,569,000 |
(1) | Remanufactured cores held at customers’ locations represent the core portion of the Company’s customers’ finished goods at the Company’s customers’ locations.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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