XML 104 R80.htm IDEA: XBRL DOCUMENT
v3.22.1

Equity Capital Structure, Description of Series B Preferred Shares (Details) - Series B Preferred Shares [Member] | 12 Months Ended
--- | ---
Dec. 31, 2021 Vote shares
Preferred Shares [Abstract] |
Voting power of each preferred share in number of common shares (in shares) | shares | 100,000
Number of votes per share | Vote | 100,000

X
- Definition The number of common shares each preferred share has in voting power. + References No definition available. + Details
Name: | ctrm_PreferredStockVotingPowerInNumberOfCommonShares
Namespace Prefix: | ctrm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of votes each outstanding preferred share is entitled to vote per share owned on all matters submitted to a vote of shareholders. + References No definition available. + Details
Name: | ctrm_PreferredStockVotingRightsNumberOfVotes
Namespace Prefix: | ctrm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |