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Debt Arrangements - Additional Information (Detail) - USD ($) | Aug. 22, 2016 | Jun. 27, 2016 | Aug. 21, 2016
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Debt Instrument [Line Items] |  |  |
Borrowed amount |  | $ 14,500,000 |
Fixed rate on borrowing |  | 2.71% |
Maturity date |  | Jul. 01, 2026 |
Current borrowing capacity |  |  | $ 50,000,000
Increased borrowing capacity | $ 65,000,000 |  |
Interest rate of LIBOR plus | 1.125% |  |
Extended debt instrument date | Jun. 30, 2019 |  |
Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt to earnings before Interest, Taxes and Depreciation ratio | 2.25% |  |
Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt to earnings before Interest, Taxes and Depreciation ratio | 1.00% |  |
Libor Spread [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate of LIBOR plus | 1.50% |  |

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