TAXES ON INCOME (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2019
Income Tax Disclosure [Line Items]
Net operating loss carry forwards	$ 231.4		$ 213.1
Parent Company [Member]
Income Tax Disclosure [Line Items]
Net operating loss carry forwards	30.9		29.0
Protalix Ltd. [Member]
Income Tax Disclosure [Line Items]
Net operating loss carry forwards	$ 200.5		$ 184.1
Protalix Ltd. [Member] | Law for Amending the Israel Income Tax Ordinance, Tax Thereafter [Member]
Income Tax Disclosure [Line Items]
Statutory income tax rate		23.00%
Maximum [Member]
Income Tax Disclosure [Line Items]
Statutory income tax rate	27.00%