Inventories - Major Classifications of Inventories (Detail) - USD ($) $ in Thousands |
Dec. 31, 2018 |
Mar. 31, 2018 |
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Raw materials and supplies | $ 2,747 | $ 3,095 |
| Work in process | 16,254 | 17,546 |
| Finished products | 3,524 | 1,034 |
| Inventory Gross | 22,525 | 21,675 |
| Less - progress payments | 10,109 | |
| Total | $ 22,525 | $ 11,566 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of advances received from customers under long-term contracts which have been offset against inventories accounts at the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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