Organization and Business Background (Details 1) - USD ($)	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Current Assets
Cash and bank balances	$ 4,716,073	$ 9,017,427	$ 10,445,739	$ 4,494,964
Restricted cash	3,975,764	6,121,637
Accounts receivable	818,255	1,843,682
Inventories	9,009,448	8,474,165
Prepayments and other current assets	3,246,169	651,523
Total current assets	17,789,945	19,986,797
Property, plant, and equipment, net	193,753,101	189,388,709
Deferred tax asset non-current	7,371,246	6,572,559
Total Assets	222,052,456	218,989,481
Current Liabilities
Short-term bank loans	13,040,505	7,192,923
Accounts payable	308,880	422,705
Notes payable	3,975,764	6,121,637
Due to a related party	102,498	60,378
Accrued payroll and employee benefits	307,472	231,247
Other payables and accrued liabilities	939,233	836,337
Income taxes payable	546,127	525,804
Total current liabilities	25,836,150	21,757,533
Loans from a related party	6,361,222	10,712,865
Total liabilities	33,437,810	33,664,117
Orient Paper HB [Member]
Current Assets
Cash and bank balances	566,627	2,681,942
Restricted cash	3,975,764	6,121,637
Accounts receivable	818,255	1,843,682
Inventories	8,965,604	8,431,972
Prepayments and other current assets	3,241,210	646,598
Total current assets	17,567,460	19,725,831
Property, plant, and equipment, net	171,880,357	167,727,768
Deferred tax asset non-current	5,844,337	5,167,288
Total Assets	195,292,154	192,620,887
Current Liabilities
Short-term bank loans	13,040,505	7,192,923
Current portion of long-term loans from credit union	5,343,426	5,142,175
Accounts payable	308,880	422,705
Notes payable	3,975,764	6,121,637
Due to a related party	102,498	60,378
Accrued payroll and employee benefits	302,414	227,163
Other payables and accrued liabilities	939,198	836,309
Income taxes payable	539,692	519,365
Total current liabilities	24,552,377	20,522,655
Loans from a related party	6,361,222	10,712,865
Total liabilities	$ 30,913,599	$ 31,235,520

The amount of current portion of long-term loans from credit union.

No definition available.

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

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).