9. Short-term notes (Details - Short term notes) - USD ($)	9 Months Ended
Feb. 28, 2019	May 31, 2019	May 31, 2018
Short term debt	$ 4,311,114		$ 1,058,084
Secured Short Term Notes [Member]
Short term debt	0	$ 0	$ 1,058,084
2017 Notes [Member]
Debt stated interest rate			6.00%
2017 Notes [Member] \| Secured Short Term Notes [Member]
Short term debt	0		$ 635,140
Debt incentive	$ 0		$ 41,539
Debt maturity date	Apr. 30, 2018
Debt stated interest rate	6.00%		6.00%
2017 Notes [Member] \| Secured Short Term Notes [Member]
Short term debt	$ 0		$ 360,000
Debt incentive	$ 0		$ 21,405
Debt maturity date	May 31, 2018
Debt stated interest rate	6.00%		6.00%
2018 Notes 10% [Member]
Short term debt	$ 3,030,000		$ 0
Debt stated interest rate	10.00%
Secured Short Term Notes [Member]
Short term debt	$ 1,206,114
Secured Short Term Notes [Member] \| 2018 Notes 8% [Member]
Short term debt	1,154,800
Debt incentive	$ 51,314
Debt stated interest rate	8.00%
2018 Notes 8% [Member]
Short term debt			0
Debt incentive			$ 0
2019 Notes 10% [Member]
Short term debt	$ 75,000

Debt incentive

No definition available.

Name:	CIIX_UnamortizedDebtIncentive
Namespace Prefix:	CIIX_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=CIIX_SecuredNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=CIIX_Notes2017Member
Namespace Prefix:
Data Type:	na
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- Details

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Namespace Prefix:
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Balance Type:
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- Details

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- Details

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Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: