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Property, Plant and Equipment (Tables) | 12 Months Ended
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Mar. 31, 2017
Property, Plant and Equipment [Abstract] |
Schedule of Cost and Accumulated Depreciation of Property and Equipment | The Company accounts for depreciation and amortization using the straight-line method to allocate the cost of property, plant and equipment over their estimated useful lives as follows:
Asset Classification |  | Estimated Useful Life in Years
Building |  | 40
Process upgrades to the building |  | 10-40
Machinery and equipment |  | 3-10
Furniture and fixtures |  | 3-5
Leasehold improvements |  | Shorter of the estimated useful life or the remaining lease term
The cost and accumulated depreciation of property and equipment at March 31, 2017 and 2016 are as follows (in thousands):
| March 31, 2017 |  | March 31, 2016
Land | $ | 3,643 |  |  | $ | 3,643 |
Construction in progress - equipment | 601 |  |  | 601 |
Buildings | 34,549 |  |  | 34,549 |
Equipment and software | 73,445 |  |  | 73,659 |
Furniture and fixtures | 1,201 |  |  | 1,215 |
Leasehold improvements | 2,442 |  |  | 3,600 |
Property, plant and equipment, gross | 115,881 |  |  | 117,267 |
Less accumulated depreciation | (72,443 | ) |  | (67,489 | )
Property, plant and equipment, net | $ | 43,438 |  |  | $ | 49,778 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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