Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2019
Leasehold improvements [Member]
Property and equipment estimated useful lives	Shorter of lease term or useful life
Computers and software [Member]
Property and equipment estimated useful lives	3 years
Equipment and furniture [Member] | Minimum [Member]
Property and equipment estimated useful lives	6 years
Equipment and furniture [Member] | Maximum [Member]
Property and equipment estimated useful lives	7 years
Laboratory equipment [Member] | Minimum [Member]
Property and equipment estimated useful lives	6 years
Laboratory equipment [Member] | Maximum [Member]
Property and equipment estimated useful lives	7 years