XML 99 R76.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Equity Capital Structure, 2020 June Equity Offering (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 26, 2020 | Sep. 22, 2017 | Dec. 31, 2023 | Dec. 31, 2022 | Mar. 07, 2023 | Jun. 23, 2020
Equity Capital Structure [Abstract] |  |  |  |  |  |
Number of units included in June Equity Offering (in shares) |  |  |  |  |  | 5,911,000
Prefunded Warrant [Member] |  |  |  |  |  |
Equity Capital Structure [Abstract] |  |  |  |  |  |
Number of securities included in each unit offered (in shares) |  |  |  |  |  | 1
Number of securities called by each warrant (in shares) |  |  |  |  |  | 1
Warrant exercise price per share (in dollars per share) |  |  |  |  |  | $ 0.1
Class A Warrant [Member] |  |  |  |  |  |
Equity Capital Structure [Abstract] |  |  |  |  |  |
Number of securities included in each unit offered (in shares) |  |  |  |  |  | 1
Number of securities called by each warrant (in shares) |  |  |  |  |  | 1
Warrant exercise price per share (in dollars per share) |  |  |  |  | $ 2.53 | $ 3.5
Issuance of warrants (in shares) | 5,911,000 |  |  |  |  |
Term of warrant |  |  | 5 years |  |  |
Warrants exercised (in shares) |  |  | 0 | 0 |  |
Warrants outstanding (in shares) |  |  | 62,344 | 62,344 |  |
Class A and Prefunded Warrant [Member] |  |  |  |  |  |
Equity Capital Structure [Abstract] |  |  |  |  |  |
Warrant exercise price per share (in dollars per share) |  |  |  |  |  | $ 3.4
Common Stock [Member] |  |  |  |  |  |
Equity Capital Structure [Abstract] |  |  |  |  |  |
Number of securities included in each unit offered (in shares) |  |  |  |  |  | 1
Issuance of common stock (in shares) |  | 240,000 | 2,013,788 |  |  |
Gross proceeds from issuance of common stock and warrants |  |  | $ 0.9 |  |  |
Net proceeds from issuance of common stock and warrants |  |  | $ 0.6 |  |  |
2020 June Equity Offering [Member] |  |  |  |  |  |
Equity Capital Structure [Abstract] |  |  |  |  |  |
Issuance of common stock (in shares) | 5,908,269 |  |  |  |  |
Gross proceeds from issuance of common stock and warrants | $ 20.7 |  |  |  |  |
Net proceeds from issuance of common stock and warrants | $ 18.6 |  |  |  |  |
Over-Allotment Option [Member] |  |  |  |  |  |
Equity Capital Structure [Abstract] |  |  |  |  |  |
Issuance of units (in shares) | 771,000 |  |  |  |  |

X
- Definition Number of warrants or rights exercised during the period. + References No definition available. + Details
Name: | ctrm_ClassOfWarrantOrRightExercised
Namespace Prefix: | ctrm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants issued during the period. + References No definition available. + Details
Name: | ctrm_ClassOfWarrantOrRightIssued
Namespace Prefix: | ctrm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of securities included in the unit offered. + References No definition available. + Details
Name: | ctrm_NumberOfSecuritiesIncludedInUnitOffered
Namespace Prefix: | ctrm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units included in a public offering, consisting of (i) one common share or a pre-funded warrant to purchase one common share at an exercise price equal to $0.01 per common share (a "Pre-Funded Warrant"), and (ii) one Class A Warrant to purchase one common share (a "Class A Warrant"), for $0.35 per unit (or $0.34 per unit including a pre-funded warrant), or the June Equity Offering. + References No definition available. + Details
Name: | ctrm_PublicOfferingNumberOfUnits
Namespace Prefix: | ctrm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of units issued during the period. Each unit consists of (i) one common share or a pre-funded warrant to purchase one common share at an exercise price equal to $0.01 per common share (a "Pre-Funded Warrant"), and (ii) one Class A Warrant to purchase one common share (a "Class A Warrant"), for $0.35 per unit (or $0.34 per unit including a pre-funded warrant). + References No definition available. + Details
Name: | ctrm_UnitsIssuedDuringPeriodShares
Namespace Prefix: | ctrm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-3 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-14 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 + Details
Name: | us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Cash received on stock transaction after deduction of issuance costs. + References No definition available. + Details
Name: | us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481004/946-505-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(4)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=ctrm_PrefundedWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=ctrm_ClassAWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=ctrm_ClassAAndPrefundedWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=ctrm_EquityOfferingJune2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |