Subsequent Events (Narrative) (Details) - Subsequent Event [Member] $ / shares in Units, $ in Millions	Oct. 01, 2021 USD ($) $ / shares shares
Subsequent Event [Line Items]
Net proceeds from issuance of common stock | $	$ 50.2
Shares sold at the market, shares	9,200,000
MiNK Therapeutics [Member]
Subsequent Event [Line Items]
Own share	26,332,958
Percentage of Shares	0.786
Initial Public Offering [Member] | MiNK Therapeutics [Member]
Subsequent Event [Line Items]
Common stock initial public offering shares	3,333,334
Common stock price per share | $ / shares	$ 12.00
Gross proceeds from issuance initial public offering | $	$ 40.0
Over-Allotment Option [Member] | MiNK Therapeutics [Member]
Subsequent Event [Line Items]
Common stock initial public offering shares	500,000