XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.25.2

Commitments and Contingencies (Details) - USD ($) | 12 Months Ended
--- | ---
Apr. 30, 2025 | Apr. 30, 2024
Commitments and Contingencies [Line Items] |  |
Royalty expense | $ 462,000 | $ 362,000
Minimum |  |
Commitments and Contingencies [Line Items] |  |
Royalty fee per tumor sample | $ 0 |
Royalty payment, as percent of contract price | 2.00% |
Maximum |  |
Commitments and Contingencies [Line Items] |  |
Royalty fee per tumor sample | $ 30,000 |
Royalty payment, as percent of contract price | 20.00% |

X
- Definition Collaboration Arrangement Royalty Fee + References No definition available. + Details
Name: | csbr_CollaborationArrangementRoyaltyFee
Namespace Prefix: | csbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Collaboration Arrangement, Royalty Fee, Percent Of Contract Price + References No definition available. + Details
Name: | csbr_CollaborationArrangementRoyaltyFeePercentOfContractPrice
Namespace Prefix: | csbr_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | csbr_CommitmentsAndContingenciesLineItems
Namespace Prefix: | csbr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_RoyaltyExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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: |