XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.21.2

Schedule of Risk Adjustment Assessment (Details) | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Risk-adjustment Assessment of achieving each Milestone | 80.00% | 80.00% | 80.00% | 80.00% | 80.00% | 80.00%
Discount Rate | 9.00% | 9.00% |  | 9.00% | 9.00% | 9.00%
Minimum [Member] |  |  |  |  |  |
Discount Rate |  |  | 6.54% |  |  |
Estimated time to achieve mile stone | 5 months 1 day | 6 months 14 days | 3 months 14 days | 4 months 17 days | 6 months 14 days | 1 year 1 month 13 days
Maximum [Member] |  |  |  |  |  |
Discount Rate |  |  | 6.60% |  |  |
Estimated time to achieve mile stone | 1 year 5 months 1 day | 1 year 6 months 14 days | 1 year 3 months 14 days | 1 year 4 months 17 days | 1 year 6 months 14 days | 2 years 1 month 13 days

X
- Definition Discount rate on milestone liabilities. + References No definition available. + Details
Name: | CLSN_DiscountRatesOnMileStoneLiabilities
Namespace Prefix: | CLSN_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated time to achieve milestone liability. + References No definition available. + Details
Name: | CLSN_EstimatedTimeToAchieveMileStone
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_RiskadjustmentAssessmentOfAchievingMilestone
Namespace Prefix: | CLSN_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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: |