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RELATED PARTY TRANSACTIONS AND BALANCES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related party balances:
Amounts due from related parties	$ 129	$ 17
Amounts due to related parties	5,150	38,825
Discontinued Operations
Related party balances:
Amounts due to related parties		188
Continuing Operations
Related party balances:
Amounts due from related parties	129	17
Amounts due to related parties	5,150	38,825
Daqo Group [Member] | Continuing Operations
Related party balances:
Amounts due to related parties		7,904
Others [Member] | Discontinued Operations
Related party balances:
Amounts due to related parties		188
Nanjing Yidian Huichuang information technology Co., Ltd [Member]
Related Party Transaction [Line Items]
Sales		3,987	$ 6,695
Purchases of Fixed Assets [Member]
Related Party Transaction [Line Items]
Purchases	1,414	46,583	18,183
Purchases of Fixed Assets [Member] | Nanjing Yidian Huichuang information technology Co., Ltd [Member]
Related Party Transaction [Line Items]
Purchases	1,218	8,690	975
Purchases of Raw Materials [Member]
Related Party Transaction [Line Items]
Purchases	560	3,325	898
Purchases of Raw Materials [Member] | Nanjing Yidian Huichuang information technology Co., Ltd [Member]
Related Party Transaction [Line Items]
Purchases	560	1,625	566
Proceeds From Interest Free Loans [Member] | Daqo Group [Member]
Related Party Transaction [Line Items]
Other transactions			25,745
Repayment of Interest Free Loans [Member] | Daqo Group [Member]
Related Party Transaction [Line Items]
Other transactions	11,597		36,648
Proceeds From Related Parties Loans [Member]
Related Party Transaction [Line Items]
Other transactions	22,869	20,388	104,301
Repayment Of Related Parties Loans [Member]
Related Party Transaction [Line Items]
Other transactions	47,538	20,388	104,422
Zhengjiang Daqo Solar Co. Ltd [Member]
Related Party Transaction [Line Items]
Sales		3,987	6,695
Zhengjiang Daqo Solar Co. Ltd [Member] | Proceeds From Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions	4,349		10,904
Zhengjiang Daqo Solar Co. Ltd [Member] | Repayment of Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions	4,349
Daqo Solar Co Ltd [Member] | Proceeds From Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions	18,520	16,005	55,613
Daqo Solar Co Ltd [Member] | Repayment of Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions	18,412	16,005	55,651
Xinjiang Daqo Investment | Proceeds From Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions			3,937
Xinjiang Daqo Investment | Repayment of Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions			4,021
Daqo New Material [Member] | Continuing Operations
Related party balances:
Amounts due to related parties	4,549	4,266
Daqo New Material [Member] | Proceeds From Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions			1,893
Daqo New Material [Member] | Repayment of Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions			1,893
Chongqing Daqo Tailai [Member] | Continuing Operations
Related party balances:
Amounts due to related parties	55	8,004
Chongqing Daqo Tailai [Member] | Purchases of Fixed Assets [Member]
Related Party Transaction [Line Items]
Purchases	111	15,212	8,241
Chongqing Daqo Tailai [Member] | Proceeds From Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions		2,541	6,209
Chongqing Daqo Tailai [Member] | Repayment of Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions	5,049	2,541	6,209
Jiangsu Daqo [Member] | Continuing Operations
Related party balances:
Amounts due to related parties	5	3,162
Jiangsu Daqo [Member] | Purchases of Fixed Assets [Member]
Related Party Transaction [Line Items]
Purchases		4,115	1,327
Nanjing Daqo Electric [Member] | Continuing Operations
Related party balances:
Amounts due to related parties		3,241
Nanjing Daqo Electric [Member] | Purchases of Fixed Assets [Member]
Related Party Transaction [Line Items]
Purchases	45	6,229	1,439
Other Subsidiaries of Daqo Group [Member] | Continuing Operations
Related party balances:
Amounts due from related parties	25	17
Amounts due to related parties	371	1,121
Zhenjiang Electric Equipment Co Ltd [Member] | Continuing Operations
Related party balances:
Amounts due to related parties		1,490
Zhenjiang Electric Equipment Co Ltd [Member] | Purchases of Raw Materials [Member]
Related Party Transaction [Line Items]
Purchases		1,700	332
Nanjing Daqo Transformer [Member] | Continuing Operations
Related party balances:
Amounts due from related parties	104
Amounts due to related parties	170	9,637
Nanjing Daqo Transformer [Member] | Purchases of Fixed Assets [Member]
Related Party Transaction [Line Items]
Purchases	40	12,337	$ 6,201
Nanjing Daqo Transformer [Member] | Proceeds From Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions		1,842
Nanjing Daqo Transformer [Member] | Repayment of Interest Free Loans [Member]
Related Party Transaction [Line Items]
Other transactions	$ 8,131	$ 1,842

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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