SCHEDULE I - PARENT ONLY FINANCIAL INFORMATION (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current Assets
Prepayments and deposits	$ 1,332,970	$ 8,096,636
Total Current Assets	107,202,708	187,343,536
Non-Current Assets
Total Non-Current Assets	172,048,277	111,203,254
Total Assets	279,250,985	298,546,790
Current Liabilities
Other payables and accrued expenses	1,106,048	905,258
Total Current Liabilities	6,306,264	2,623,841
Total Liabilities	16,143,885	4,693,386
Stockholders' Equity
PREFERRED STOCK; $0.001 par value; 1,000,000 shares authorized; none outstanding	0	0
COMMON STOCK; $0.0005 par value; 80,000,000 shares authorized; 9,562,444 and 9,410,588 shares issued; and 9,516,614 and 9,360,758 shares outstanding as of December 31, 2019 and December 31, 2018	23,904	23,525
Treasury stock; 45,830 and 49,830 shares as of December 31, 2019 and December 31, 2018 at cost	(510,329)	(554,870)
Additional paid-in capital	95,043,388	95,020,808
Retained earnings unappropriated	159,808,400	185,608,445
Retained earnings appropriated	24,233,544	24,233,544
Total Stockholders' Equity	263,107,100	293,853,404	$ 381,962,196
Total Liabilities and Stockholders' Equity	279,250,985	298,546,790
Parent
Current Assets
Prepayments and deposits	0	0
Total Current Assets	0	0
Non-Current Assets
Interests in subsidiaries	200,057,813	230,229,081
Amounts due from group companies	63,546,235	64,017,517
Total Non-Current Assets	263,604,048	294,246,598
Total Assets	263,604,048	294,246,598
Current Liabilities
Other payables and accrued expenses	354,247	250,493
Amounts due to group companies	142,701	142,701
Total Current Liabilities	496,948	393,194
Total Liabilities	496,948	393,194
Stockholders' Equity
PREFERRED STOCK; $0.001 par value; 1,000,000 shares authorized; none outstanding	0	0
COMMON STOCK; $0.0005 par value; 80,000,000 shares authorized; 9,562,444 and 9,410,588 shares issued; and 9,516,614 and 9,360,758 shares outstanding as of December 31, 2019 and December 31, 2018	23,904	23,525
Treasury stock; 45,830 and 49,830 shares as of December 31, 2019 and December 31, 2018 at cost	(510,329)	(554,870)
Additional paid-in capital	95,043,388	95,020,808
Retained earnings unappropriated	159,808,400	185,608,445
Retained earnings appropriated	24,233,544	24,233,544
Cumulative translation adjustment	(5,491,807)	(10,478,048)
Total Stockholders' Equity	263,107,100	293,853,404
Total Liabilities and Stockholders' Equity	$ 263,604,048	$ 294,246,598

No definition available.

Name:	GURE_InterestsInSubsidiaries
Namespace Prefix:	GURE_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.