The Business - Narrative (Details) - USD ($) $ in Millions	1 Months Ended
	May 31, 2017	Mar. 31, 2018	Oct. 31, 2017	Feb. 28, 2017
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Grants awarded		$ 8.6		$ 12.2
Funding of grant award	$ 5.7
Ischemic Repair (CD34 Cell Technology) [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Grants awarded			$ 1.9