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COMMITMENTS AND CONTINGENCIES Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2020 | Apr. 01, 2019 | Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract] |  |  |
Operating Lease, Right-of-Use Asset | $ 1,210 | $ 2,400 | $ 0
Operating Lease Liabilities | 1,277 | $ 2,500 | $ 0
Termination of Lease, Right-of-Use Asset | 514 |  |
Termination of Lease, Lease Liability | $ 528 |  |

X
- Definition Termination of Lease, Lease Liability + References No definition available. + Details
Name: | cidm_TerminationofLeaseLeaseLiability
Namespace Prefix: | cidm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Termination of Lease, Right-of-Use Asset + References No definition available. + Details
Name: | cidm_TerminationofLeaseRightofUseAsset
Namespace Prefix: | cidm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant