Notes Payable (Details) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Notes payable (Textual)
Notes payable	$ 10,094,103us-gaap_NotesPayableCurrent	$ 16,113,744us-gaap_NotesPayableCurrent
Restricted cash	5,047,052	8,873,999
Property plant and equipment loan drawn from banking facility		29,995
Description of maturity of loans payable	Due and payable on various dates starting from April 14, 2015 to July 22, 2015.	Due and payable on various dates starting from January 7, 2015 to April 23, 2015.
Bank of Hebei (b) [Member]
Notes payable (Textual)
Number of bank acceptance notes		11
Notes payable	6,512,325	1,405,458
Property plant and equipment loan drawn from banking facility		29,995
Short-term bank loans, fixed interest rate
Handling charges of bank acceptance notes percentage	0.05%	0.05%
SPD Bank [Member]
Notes payable (Textual)
Notes payable	3,581,778	6,537,016
Short-term bank loans, fixed interest rate
Handling charges of bank acceptance notes percentage	0.05%	0.05%
Commercial Bank City of Zhangjiakou [Member]
Notes payable (Textual)
Notes payable		$ 8,171,270
Short-term bank loans, fixed interest rate
Handling charges of bank acceptance notes percentage		0.05%

Handling charges of bank acceptance notes percentage.

No definition available.

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Namespace Prefix:	onp_
Data Type:	num:percentItemType
Balance Type:	na
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- Details

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Namespace Prefix:	onp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of bank acceptance notes.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

Property plant and equipment loan drawn from banking facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	onp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19,20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date which accrues interest at a set, unchanging rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

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- Details

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