Nauticus Robotics, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Notes Payable - Narrative (Details)

Notes Payable - Narrative (Details)					1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
Notes Payable - Narrative (Details)	Jun. 28, 2026 USD ($) shares	Jun. 01, 2026 USD ($) $ / shares	May 21, 2026 USD ($) shares	May 11, 2026 USD ($) $ / shares	Jun. 15, 2026 USD ($) shares	Nov. 30, 2024 day $ / shares	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) shares	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2017 USD ($)	May 31, 2026 USD ($)	May 12, 2026 USD ($)	May 10, 2026 USD ($)	Mar. 10, 2026 USD ($)	Feb. 09, 2026 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt							$ (4,629,822)	$ 0	$ (5,559,330)	$ 0
Total loan funded							21,632,710		21,632,710		$ 22,076,615
Loss (gain) on change in fair value of debentures									1,094,112	536,060
Conversion of convertible secured debentures									8,320,000
Notes payable outstanding							21,609,287		21,609,287		21,845,024
Short-term debt							297,355		$ 297,355
Minimum
Debt Instrument [Line Items]
Short-term debt, interest rate increase									7.15%
Maximum
Debt Instrument [Line Items]
Short-term debt, interest rate increase									7.69%
Convertible debt
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt							(108,141)		$ (108,141)
Debt conversion, converted instrument, amount		$ 1,075,150		$ 532,991
Convertible debt \| Series C Preferred Stock
Debt Instrument [Line Items]
Fair value of debt							3,659,502		3,659,502
Gain (loss) on extinguishment of debt									(929,508)
November 2024 Debentures
Debt Instrument [Line Items]
Debt conversion, converted instrument, amount									$ 1,500,000
Convertible debt, number of shares (in shares) \| shares									782,829
November 2024 Debentures \| Debt Conversion 1
Debt Instrument [Line Items]
Aggregate principal amount of secured debentures							100,000		$ 100,000
Converted stock (in shares) \| shares									27,932
November 2024 Debentures \| Debt Conversion 2 \| Series C Preferred Stock
Debt Instrument [Line Items]
Converted stock (in shares) \| shares									2,023
November 2024 Debentures \| Convertible debt
Debt Instrument [Line Items]
Percentage of promissory note						2.00%
Conversion price (in dollars per share) \| $ / shares						$ 88.56
Conversion ratio						1.20
Conversion price floor (in dollars per share) \| $ / shares						$ 17.71
Stock price trigger, threshold percentage						98.00%
Number of trading days \| day						10
Aggregate principal amount of secured debentures							2,485,000		$ 2,485,000		100,000
Total loan funded							$ 2,729,000		$ 2,729,000		$ 163,672
Debt term							2 months 8 days		2 months 8 days		8 months 8 days
Debt conversion, converted instrument, amount									$ 2,485,000		$ 100,000
November 2024 Debentures \| Convertible debt \| Measurement Input, Share Price
Debt Instrument [Line Items]
Measurement inputs							1.23		1.23		6.16
November 2024 Debentures \| Convertible debt \| Measurement Input, Risk Free Interest Rate
Debt Instrument [Line Items]
Measurement inputs							0.040		0.040		0.0355
November 2024 Debentures \| Convertible debt \| Measurement Input, Price Volatility
Debt Instrument [Line Items]
Measurement inputs							1.45		1.45		1.54
November 2024 Debentures \| Convertible debt \| Debt Conversion 1
Debt Instrument [Line Items]
Fair value of debt							$ 283,790		$ 283,790
Debt conversion, converted instrument, amount									$ 100,000
Convertible debt, number of shares (in shares) \| shares									27,932
Interest expense									$ 283,790
November 2024 Debentures \| Convertible debt \| Debt Conversion 2
Debt Instrument [Line Items]
Aggregate principal amount of secured debentures							2,000,000		2,000,000
Fair value of debt							2,729,994		2,729,994
Senior Secured Convertible Debenture \| Secured Debt
Debt Instrument [Line Items]
Aggregate principal amount of secured debentures														$ 1,525,000		$ 1,000,000	$ 1,960,000
New Convertible Secured Debentures
Debt Instrument [Line Items]
Loss (gain) on change in fair value of debentures							(94,728)	(187,866)	1,094,112	536,060
Senior Secured Convertible Term Loan Total
Debt Instrument [Line Items]
Aggregate principal amount of secured debentures							30,600,000		$ 30,600,000
September 2023 Term Loan Agreement
Debt Instrument [Line Items]
Conversion price (in dollars per share) \| $ / shares		$ 1.80		$ 2.20
Debt conversion, converted instrument, amount			$ 500,000		$ 1,000,000
Term loan bears interest									12.50%
Exit fee									2.50%
Conversion price reverted			$ 15,552		$ 15,552								$ 15,552		$ 15,552
Convertible debt, number of shares (in shares) \| shares			227,273		555,556
January 2024 Term Loan Agreement
Debt Instrument [Line Items]
Term loan bears interest									15.00%
Interest payment percentage									100.00%
Capitalize interest payable percentage									50.00%
Extended Maturity Loan
Debt Instrument [Line Items]
Total loan funded							1,000,000.0		$ 1,000,000.0
Debt instrument term									30 years
2023 Term Loan
Debt Instrument [Line Items]
Aggregate principal amount of secured debentures	$ 2,146,701
Converted, outstanding debt	4,000,000
Interest payable	$ 1,853,299
2023 Term Loan \| Series C Preferred Stock
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt									$ (4,320,000)
Debt conversion, converted instrument, amount									8,320,000
2023 Term Loan \| Series C Convertible Preferred Stock
Debt Instrument [Line Items]
Conversion of stock (in shares) \| shares	4,800
Conversion of convertible secured debentures	$ 4,800,000
Convertible Secured Debentures \| Convertible debt \| ATW Special Situations II LLC
Debt Instrument [Line Items]
Interest expense							235,318	139,161	465,519	276,793
Convertible Secured Debentures \| Convertible debt \| ATW Special Situations II LLC \| Related Party
Debt Instrument [Line Items]
Notes payable outstanding							9,274,089		9,274,089		$ 2,687,981
Convertible Secured Debentures \| Convertible debt \| ATW Special Situations III LLC
Debt Instrument [Line Items]
Interest expense							27,812	25,794	54,812	75,876
Convertible Secured Debentures \| Convertible debt \| ATW Special Situations III LLC \| Related Party
Debt Instrument [Line Items]
Notes payable outstanding							1,245,695		1,245,695		7,197,668
Convertible Secured Debentures \| Convertible debt \| Material Impact
Debt Instrument [Line Items]
Interest expense							118,796	114,762	235,275	277,386
Convertible Secured Debentures \| Convertible debt \| Material Impact \| Related Party
Debt Instrument [Line Items]
Notes payable outstanding							4,490,377		4,490,377		4,399,060
Convertible Secured Debentures \| Convertible debt \| ATW Special Situations I LLC
Debt Instrument [Line Items]
Interest expense								$ 51,944		$ 103,317
Senior Secured Term Loan Agreement \| Convertible debt \| ATW Special Situations I and II LLCs
Debt Instrument [Line Items]
Aggregate principal amount of secured debentures							2,551,855		$ 2,551,855
Convertible debt, number of shares (in shares) \| shares									25,075
Interest payable							318,718		$ 318,718
SBA loan \| Notes Payable to Banks
Debt Instrument [Line Items]
Total loan funded							485,325		485,325		485,300
Notes payable outstanding							485,325		485,325
SBA loan \| Notes Payable to Banks \| SeaTrepid International, L.L.C
Debt Instrument [Line Items]
Aggregate principal amount of secured debentures																		$ 485,300
Bears interest rate																		3.75%
AmeriState loan \| Notes Payable to Banks
Debt Instrument [Line Items]
Total loan funded							1,757,571		1,757,571		$ 1,811,327
Notes payable outstanding							$ 1,757,571		$ 1,757,571
Debt-to-net worth ratio							9.0		9.0
Minimum debt service coverage ratio									1.0
AmeriState loan \| Notes Payable to Banks \| SeaTrepid International, L.L.C
Debt Instrument [Line Items]
Percentage of promissory note												2.50%
Aggregate principal amount of secured debentures												$ 2,335,000