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Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Significant Accounting Policies [Line Items] |  |  |
Accounts receivable factored | $ 23,100,000 | $ 20,500,000 |
Inventory reserve amount | $ 18,500,000 | 17,700,000 |
Property, plant and equipment estimated useful lives, years | 15 years |  |
Total carrying value of equity method investment | $ 11,700,000 | 11,400,000 |
Pro-rata share of earnings from equity method investment | 744,000 | 29,000 | $ 948,000
Loss contingency liability | $ 0 |  |
Maximum percentage of total revenues represented by distributors and agents that are not granted price protection | 10.00% |  |
Maximum percentage of contract related revenues | 1.00% |  |
Accumulated foreign currency translation adjustments, net of income taxes | $ (8,400,000) | (6,200,000) |
Accumulated pension adjustments, net of income taxes | $ (5,400,000) | (7,800,000) |
ASU 2015-03 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Reclassification as unamortized debt issuance costs |  | 600,000 |
ASU 2014-09 | Military Related Contracts | Consolidated Revenues | Product Concentration Risk |  |  |
Significant Accounting Policies [Line Items] |  |  |
Percentage of consolidated revenues | 10.00% |  |
Guangdong Fuxin Electronic Technology |  |  |
Significant Accounting Policies [Line Items] |  |  |
Non-controlling minority interest | 20.20% |  |
Pro-rata share of earnings from equity method investment | $ 700,000 | 100,000 | 900,000
Dividends from equity investment | $ 400,000 | $ 600,000 | $ 600,000
Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Finite-lived intangible assets useful life, years | 5 years |  |
Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Finite-lived intangible assets useful life, years | 20 years |  |
Building improvements and land improvements | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment estimated useful lives, years | 10 years |  |
Building improvements and land improvements | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment estimated useful lives, years | 20 years |  |
Machinery and Equipment | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment estimated useful lives, years | 3 years |  |
Machinery and Equipment | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment estimated useful lives, years | 20 years |  |

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