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Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail)) - USD ($) $ in Thousands | Mar. 31, 2018 | Aug. 31, 2017 | Jun. 30, 2017
--- | --- | --- | ---
Assets |  |  |
Goodwill | $ 274,516 |  | $ 250,342
II-VI Compound Semiconductor Ltd (Kaiam Laser Limited, Inc) |  |  |
Assets |  |  |
Accounts receivable |  | $ 79 |
Inventories |  | 4,559 |
Prepaid and other assets |  | 1,246 |
Property, plant & equipment |  | 63,899 |
Intangible assets |  | 4,046 |
Goodwill |  | 19,198 |
Total assets acquired |  | 93,027 |
Liabilities |  |  |
Accounts payable |  | 751 |
Other accrued liabilities |  | 2,486 |
Deferred tax liabilities |  | 10,797 |
Total liabilities assumed |  | 14,034 |
Net assets acquired |  | $ 78,993 |
Integrated Photonics, Inc |  |  |
Assets |  |  |
Accounts receivable |  |  | 2,083
Inventories |  |  | 3,968
Prepaid and other assets |  |  | 322
Property, plant & equipment |  |  | 11,235
Intangible assets |  |  | 23,554
Goodwill |  |  | 17,514
Total assets acquired |  |  | 58,676
Liabilities |  |  |
Accounts payable |  |  | 847
Other accrued liabilities |  |  | 1,032
Long-term debt assumed |  |  | 3,834
Deferred tax liabilities |  |  | 9,802
Total liabilities assumed |  |  | 15,515
Net assets acquired |  |  | $ 43,161

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