XML 43 R54.htm IDEA: XBRL DOCUMENT
v3.19.3

Earn-out Milestone Liability - Schedule of Milestone Risk Adjustment Assessment (Details) | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Risk-adjustment Assessment of achieving each Milestone | 80.00% |  | 80.00% |  | 80.00% |
Discount Rate | 9.00% | 9.00% | 9.00% | 9.00% | 9.00% | 9.00%
Estimated Time to Achieve |  |  |  |  | 1 year 2 months 30 days |
Minimum [Member] |  |  |  |  |  |
Risk-adjustment Assessment of achieving each Milestone |  | 35.00% |  | 0.00% |  | 35.00%
Estimated Time to Achieve | 9 months | 9 months 29 days | 11 months 1 day | 0 years |  | 1 year 3 months 29 days
Maximum [Member] |  |  |  |  |  |
Risk-adjustment Assessment of achieving each Milestone |  | 80.00% |  | 80.00% |  | 80.00%
Estimated Time to Achieve | 1 year 9 months | 1 year | 1 year 11 months 1 day | 1 year 2 months 1 day |  | 1 year 6 months

X
- Definition Discount Rate. + References No definition available. + Details
Name: | CLSN_DiscountRate
Namespace Prefix: | CLSN_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Estimated Time to Achieve. + References No definition available. + Details
Name: | CLSN_EstimatedTimeToAchieve1
Namespace Prefix: | CLSN_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Risk-adjustment Assessment of achieving each Milestone. + References No definition available. + Details
Name: | CLSN_RiskadjustmentAssessmentOfAchievingEachMilestone
Namespace Prefix: | CLSN_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |