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Summary of Significant Accounting Policies (Details) - Schedule of goodwill and accumulated impairment charges $ in Thousands	12 Months Ended
	Mar. 31, 2022 USD ($)
Schedule of goodwill and accumulated impairment charges [Abstract]
Goodwill at beginning	$ 8,701
Goodwill from business combinations – see Note 4	12,383
Goodwill at ending	$ 21,084

X

- Definition

Goodwill gross.

+ References

No definition available.

+ Details

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Namespace Prefix:	cidm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

No definition available.

+ Details

Name:	cidm_GoodwillGrossending
Namespace Prefix:	cidm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	cidm_ScheduleOfGoodwillAndAccumulatedImpairmentChargesAbstract
Namespace Prefix:	cidm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 55
-Paragraph 24
-URI https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant