Currency Exchange Rates (Detail) - ¥ / shares	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Balance Sheet
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Currency exchange rate used in creating the amounts included in balance sheet, statements of operations and cash	¥ 6.3538	¥ 6.1460	¥ 6.1547
Statements of Operations and Cash Flows
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Currency exchange rate used in creating the amounts included in balance sheet, statements of operations and cash	¥ 6.1606	¥ 6.1457	¥ 6.1480

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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