ESPP annual cap

No definition available.

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Namespace Prefix:	clbs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Employee Stock Purchase Plan, Maximum Annual Contributions Per Employee, Percent

+ References

No definition available.

+ Details

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Namespace Prefix:	clbs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Offering Periods, Employee Stock Purchase Plan

+ References

No definition available.

+ Details

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Namespace Prefix:	clbs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Offering Periods, Employee Stock Purchase Plan, Term

+ References

No definition available.

+ Details

Name:	clbs_OfferingPeriodsEmployeeStockPurchasePlanTerm
Namespace Prefix:	clbs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

percentage of ESPP closing price

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

percentage of stock closing price

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	clbs_StockOptionsActivityAxis=clbs_ESPPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=clbs_EquityIncentiveCompensationPlan2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stockholders' Equity - Equity Plan (Details)	12 Months Ended
Stockholders' Equity - Equity Plan (Details)	Dec. 31, 2018 USD ($) offering_period shares	Dec. 31, 2017 shares	Jun. 30, 2018 shares	Jan. 01, 2013 shares
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Offering Periods, Employee Stock Purchase Plan \| offering_period	2
Offering Periods, Employee Stock Purchase Plan, Term	6 months
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		15.00%
ESPP annual cap \| $	$ 25,000
percentage of stock closing price	85.00%
percentage of ESPP closing price	85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		100,000	500,000	50,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans	26,875
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	405,655
2018 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			1,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	1,054,411