Percentage price of minimum future obligation of capital lease.

No definition available.

Name:	csbr_CapitalLeaseMinimumLeasePaymentPercentage
Namespace Prefix:	csbr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The current monthly payment for capital lease contract.

+ References

No definition available.

+ Details

Name:	csbr_MonthlyCapitalLeasePayment
Namespace Prefix:	csbr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735

+ Details

Name:	us-gaap_CapitalLeasedAssetsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

+ Details

Name:	us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

+ Details

Name:	us-gaap_Depreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentLeasedToOtherPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_AssetsHeldUnderCapitalLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Property and Equipment (Details Textual) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
Property and Equipment (Details Textual) - USD ($)	Nov. 30, 2014	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015	Apr. 30, 2015
Depreciation		$ 31,000	$ 52,000	$ 95,000	$ 166,000
Capital Leased Assets, Gross		124,000		$ 124,000		$ 124,000
Monthly Capital Lease Payment	$ 3,000
Capital Lease Minimum Lease Payment Percentage				5.00%
Equipment Leased to Other Party [Member]
Capital Leases, Balance Sheet, Assets by Major Class, Net, Total	$ 149,000
Assets Held under Capital Leases [Member]
Depreciation		$ 6,000	$ 6,000	$ 19,000	$ 12,000