DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details Textual) - USD ($)	1 Months Ended			2 Months Ended	9 Months Ended
	Mar. 29, 2018	Oct. 17, 2017	Jun. 24, 2016	Nov. 20, 2017	Dec. 31, 2018	Mar. 31, 2018	Mar. 19, 2018	Dec. 31, 2017	Dec. 31, 2016
Description of Business and Basis of Presentation [Line Items]
Retained Earnings (Accumulated Deficit), Total								$ (452,702,029)	$ (441,931,827)
Percentage Of Ownership Interest In Non Stock Subsidiary								100.00%
Investors [Member]
Description of Business and Basis of Presentation [Line Items]
Proceeds From Issuance Of Common Stock Gross		$ 23,800,000
Second Closing [Member]
Description of Business and Basis of Presentation [Line Items]
Proceeds from Issuance of Common Stock			$ 6,000,000
Net Proceeds From Issuance Of Common Stock				$ 23,400,000
Subsequent Event [Member]
Description of Business and Basis of Presentation [Line Items]
Proceeds from Issuance of Common Stock	$ 29,300,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						6,172,832	6,172,832
Net Proceeds From Issuance Of Common Stock	$ 475,000
Subsequent Event [Member] | Private Placement [Member]
Description of Business and Basis of Presentation [Line Items]
Stock And Warrants To Be Issued Value							$ 50,000,000
Scenario, Forecast [Member]
Description of Business and Basis of Presentation [Line Items]
Additional Gross Proceeds From Issuance Of Common Stock To Be Received					$ 20,700,000
Stock To Be Issued, Shares							15,432,091
CASI China [Member]
Description of Business and Basis of Presentation [Line Items]
Cash								$ 12,200,000