The Business - CLBS03 (Details) $ in Millions		1 Months Ended	3 Months Ended
	Jan. 18, 2018 patient	Oct. 31, 2016 patient	Mar. 31, 2016 cohort	May 04, 2017 USD ($)	Feb. 28, 2017 USD ($)	Feb. 23, 2017 USD ($)
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Grants Receivable | $					$ 12.2	$ 12.2
Grants Receivable, Current | $				$ 5.7
Number of patients enrolled | patient		19
Interim efficacy analysis, percentage threshold			50.00%
Interim efficacy analysis, follow-up milestone period			6 years
The Sanford Project: T-Rex Study [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Number of cohorts (cohort) | cohort			2
Subsequent Event [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Number of patients enrolled | patient	110