Shareholders' Equity - Equity Issuances (Details)		1 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 14, 2016 USD ($) clinical_trial_subject $ / shares shares	Nov. 30, 2015 USD ($) shares	Mar. 31, 2016 USD ($) shares	Sep. 30, 2016 USD ($) shares	Sep. 30, 2015 USD ($)	Dec. 31, 2016 USD ($) shares	Jun. 30, 2016 shares	Mar. 10, 2016 $ / shares shares	Dec. 31, 2015 shares	May 01, 2015 USD ($)
Class of Stock [Line Items]
Common Stock Warrants, Shares | shares							362,399	141,844	321,404
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares								$ 10.00
Share Price | $ / shares								$ 7.05
Proceeds from Issuance of Warrants			$ 1,000,000
Shares Issued, Price Per Share | $ / shares	$ 4.72
Net proceeds from issuance of common stock				$ 11,650,712	$ 36,136,839
Common Stock, Shares, Issued | shares				8,181,921					5,673,302
RD Purchase Agreement [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues | shares	847,458
Proceeds from Issuance of Common Stock	$ 4,000,000
Private Purchase Agreement [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues | shares				1,398,305
Proceeds from Issuance of Common Stock				$ 6,600,000
Purchase Commitment, Maximum Amount Committed, Shares | shares	4,449,153
Proceeds from Issuance of Common Stock, Initial Closing	$ 12,600,000
Proceeds from Issuance of Common Stock, Second Closing	$ 8,400,000
Number of Subjects, Phase 2 CLBS03 Clinical Trial, Second Closing | clinical_trial_subject	70
Aspire Capital Purchase Agreement [Member]
Class of Stock [Line Items]
Purchase Commitment, Maximum Amount Committed, Shares | shares		1,101,927.6
Purchase Commitment, Remaining Minimum Amount Committed		$ 30,000,000
Term of agreement in months		24 months
Stock Issued During Period, Shares, Other | shares		84,269.6	5,000
Net proceeds from issuance of common stock			$ 30,000
Shares, Issued | shares			109,270
Common Stock, Value, Issued			$ 300,000
Discount Applied To Weighted Average Price		5.00%
Aspire Capital Purchase Agreement [Member]
Class of Stock [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed										$ 30,000,000
Common Stock, Shares, Issued | shares			36,483.7
Subsequent Event [Member] | Private Purchase Agreement [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues | shares						1,271,186
Proceeds from Issuance of Common Stock						$ 6,000,000