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)																		3 Months Ended		9 Months Ended
Notes Payable - Narrative (Details)	Aug. 06, 2025 $ / shares	Aug. 06, 2025 day $ / shares	Aug. 06, 2025 meeting $ / shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 27, 2024 USD ($) shares	Nov. 04, 2024 USD ($) day $ / shares	Sep. 30, 2024 USD ($)	May 01, 2024 USD ($)	Jan. 30, 2024 USD ($) meeting day $ / shares	Sep. 18, 2023 USD ($) $ / shares	Sep. 18, 2023 USD ($) $ / shares	Sep. 18, 2023 USD ($) $ / shares	Sep. 18, 2023 USD ($) day $ / shares	Sep. 18, 2023 USD ($) trading_day $ / shares	Jul. 14, 2023 USD ($)	Sep. 09, 2022 USD ($) shares	Aug. 17, 2017 USD ($)	Sep. 30, 2025 USD ($) $ / shares	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Sep. 05, 2025 $ / shares	Jan. 03, 2025 $ / shares	Dec. 11, 2024 USD ($)	Jul. 22, 2024 $ / shares	Dec. 31, 2023 USD ($)	Jun. 19, 2020 USD ($)
Debt Instrument [Line Items]
New convertible debentures				$ 2,583,832														$ 2,711,954		$ 2,711,954
Debenture warrants shares (in shares) \| shares																2,922,425
Inclusive proceeds																$ 35,800,000
Fair value debenture warrants																20,949,110
Debt discount upon issuance totaling																21,679,716
Loss on extinguishment of debt																		$ 0	$ 0	0	$ 78,734,949
Accretion of debt discount																				$ 30,076	401,610
Exit fee amount															$ 125,000
Fixed interest rate															12.50%
Common stock, par value (in dollars per share) \| $ / shares				$ 0.0001														$ 0.0001		$ 0.0001		$ 0.0001			$ 0.0001
Total				$ 30,084,215														$ 30,551,874		$ 30,551,874
Convertible debt
Debt Instrument [Line Items]
Fixed interest rate										100.00%	100.00%	100.00%	100.00%	100.00%
Common stock, par value (in dollars per share) \| $ / shares										$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
November 2024 Debentures
Debt Instrument [Line Items]
Gain (loss) on change in fair value of debentures																		(407,938)	0	128,122	0
November 2024 Debentures \| Convertible debt
Debt Instrument [Line Items]
Aggregate principal amount				2,150,000		$ 1,150,000												2,150,000		2,150,000				$ 1,000,000
Additional principal option available						$ 20,000,000
Original issue discount percentage						0.02
Legal fees associated with debt																								$ 190,000
Percentage of promissory note						2.00%
Conversion price (in dollars per share) \| $ / shares						$ 8.26
Conversion ratio						1.20
Conversion price floor (in dollars per share) \| $ / shares	$ 1.6524	$ 1.6524	$ 1.6524			$ 1.652
Stock price trigger, threshold percentage	98.00%					98.00%
Number of trading days		10	10			10
New convertible debentures				$ 2,583,832														$ 2,711,954		$ 2,711,954
Debt term				1 year 8 months 8 days														11 months 8 days		11 months 8 days
Gain (loss) on change in fair value of debentures																		$ 407,938		$ (128,122)
Original issue discount percentage																		2.00%		2.00%
Total				$ 2,583,832														$ 2,711,954		$ 2,711,954
November 2024 Debentures \| Convertible debt \| Measurement Input, Share Price
Debt Instrument [Line Items]
Measurement inputs				13.95														2.88		2.88
November 2024 Debentures \| Convertible debt \| Measurement Input, Risk Free Interest Rate
Debt Instrument [Line Items]
Measurement inputs				0.0422														0.0370		0.0370
November 2024 Debentures \| Convertible debt \| Measurement Input, Price Volatility
Debt Instrument [Line Items]
Measurement inputs				1.38														1.72		1.72
Convertible Secured Debentures \| Convertible debt
Debt Instrument [Line Items]
Aggregate principal amount																$ 36,530,320
Original issue discount percentage									0.05	0.05	0.05	0.05	0.05	0.05
Conversion price (in dollars per share) \| $ / shares									$ 0.4582
Conversion ratio									1.20
Conversion price floor (in dollars per share) \| $ / shares									$ 0.0878
Stock price trigger, threshold percentage									98.00%
Number of trading days \| day									10
Original issue discount percentage																2.00%
Debt instrument term																4 years
Minimum number of stockholder meetings required under convertible debt covenants \| meeting									1
Bears interest rate									5.00%
Debt instrument, convertible, threshold proceeds of stock price trigger									$ 30,000,000
Debt instrument, convertible, interest rate									0.90
Convertible Secured Debentures \| Convertible debt \| ATW
Debt Instrument [Line Items]
Aggregate principal amount									$ 29,591,600
Convertible Secured Debentures \| Convertible debt \| Material Impact
Debt Instrument [Line Items]
Aggregate principal amount				$ 5,102,000
Floor price and alternate conversion price variance and interest cost on debt conversion to preference shares				$ 240,219
Convertible Secured Debentures \| Convertible debt \| Material Impact \| Series A Preferred Stock
Debt Instrument [Line Items]
Convertible debt, number of shares (in shares) \| shares				5,342
Convertible Secured Debentures \| Convertible debt \| Material Impact \| Related Party
Debt Instrument [Line Items]
Aggregate principal amount									5,102,000
Convertible Secured Debentures \| Convertible debt \| SLS Irrevocable Trust \| Related Party
Debt Instrument [Line Items]
Aggregate principal amount									1,836,720
Convertible Secured Debentures \| Convertible debt \| ATW Special Situations I LLC
Debt Instrument [Line Items]
Aggregate principal amount					$ 16,672,369				29,591,600
Floor price and alternate conversion price variance and interest cost on debt conversion to preference shares					$ 10,915,974
Convertible Secured Debentures \| Convertible debt \| ATW Special Situations I LLC \| Series A Preferred Stock
Debt Instrument [Line Items]
Convertible debt, number of shares (in shares) \| shares					27,588
Convertible Secured Debentures \| Convertible debt \| SLS Family Irrevocable Trust
Debt Instrument [Line Items]
Aggregate principal amount				$ 0
Floor price and alternate conversion price variance and interest cost on debt conversion to preference shares				$ 2,504,440
Convertible Secured Debentures \| Convertible debt \| SLS Family Irrevocable Trust \| Series A Preferred Stock
Debt Instrument [Line Items]
Convertible debt, number of shares (in shares) \| shares				2,504
Convertible Secured Debentures \| Convertible debt \| SLS Family Irrevocable Trust \| Related Party
Debt Instrument [Line Items]
Aggregate principal amount									1,836,720
Secured Promissory Note
Debt Instrument [Line Items]
Aggregate principal amount															$ 5,000,000
Original issue discount percentage															0.025
Bears interest rate															15.00%
Secured Promissory Note \| Secured Debt
Debt Instrument [Line Items]
Accretion of debt discount															$ 125,000
Convertible senior secured term loan \| Convertible debt
Debt Instrument [Line Items]
Legal fees associated with debt										$ 577,500	$ 577,500	$ 577,500	$ 577,500	$ 577,500												$ 72,000
Conversion price (in dollars per share) \| $ / shares										$ 1,944	$ 1,944	$ 1,944	$ 1,944	$ 1,944									$ 14.31
Debt term										91 days	91 days	91 days	91 days	91 days
Debt instrument term										3 years
Bears interest rate										2.50%	2.50%	2.50%	2.50%	2.50%
Accretion of debt discount											$ 125,000
Exit fee amount										$ 290,000	$ 290,000	$ 290,000	$ 290,000	$ 290,000
Fixed interest rate										2.50%	2.50%	2.50%	2.50%	2.50%
Receivable portion of convertible senior secured note payable									3,753,144	$ 20,000,000	$ 20,000,000	$ 20,000,000	$ 20,000,000	$ 20,000,000												695,000
Days required for prior written notice for secured term loans													5	2
Interest rate percentage												12.50%
Gain on interest expense											378,118
Total				$ 27,500,383														$ 25,463,285		$ 25,463,285						$ 12,295,000
Convertible senior secured term loan \| Convertible debt \| Minimum
Debt Instrument [Line Items]
Initial amount funded under convertible senior secured term loan agreement										$ 11,600,000	$ 11,600,000	$ 11,600,000	$ 11,600,000	$ 11,600,000
New Convertible Secured Debentures
Debt Instrument [Line Items]
Gain (loss) on change in fair value of debentures																		$ 0	(24,199,071)	$ 0	(36,113,800)
New Convertible Secured Debentures \| Convertible debt
Debt Instrument [Line Items]
New convertible debentures				0			$ 53,222,499		$ 99,195,791										53,222,499		53,222,499
Gain (loss) on change in fair value of debentures																			$ 24,199,071		36,113,800
Original issue discount percentage																		5.00%		5.00%
Debt instrument term							1 year 11 months 8 days		2 years 7 months 9 days
Loss on extinguishment of debt																					$ 78,734,949
New Convertible Secured Debentures \| Convertible debt \| Measurement Input, Share Price
Debt Instrument [Line Items]
Measurement inputs							1.41		16.52										1.41		1.41
New Convertible Secured Debentures \| Convertible debt \| Measurement Input, Risk Free Interest Rate
Debt Instrument [Line Items]
Measurement inputs							0.0411		0.0423										0.0411		0.0411
New Convertible Secured Debentures \| Convertible debt \| Measurement Input, Price Volatility
Debt Instrument [Line Items]
Measurement inputs							1.23		1.21										1.23		1.23
ATW Extended Maturity Loan \| Convertible debt
Debt Instrument [Line Items]
Debt instrument term									30 years
Senior Secured Term Loan Agreement
Debt Instrument [Line Items]
Bears interest rate									15.00%
Senior Secured Term Loan Agreement \| Convertible debt
Debt Instrument [Line Items]
Original issue discount percentage									0.05
Legal fees associated with debt								$ 37,500	$ 1,237,291
Conversion price (in dollars per share) \| $ / shares									$ 148.50
Debt term									91 days
Debt instrument term								30 years
Accretion of debt discount																		$ 10,156	$ 10,074	$ 30,076	$ 29,942
Receivable portion of convertible senior secured note payable								$ 1,000,000	$ 9,551,856
Days required for prior written notice for secured term loans \| day									5
Additional secured term loans available									$ 6,000,000
Additional secured loans available, period to utilize option									180 days
Committed amount of debt									$ 1,000,000
Senior Secured Term Loan Agreement \| Convertible debt \| ATW Special Situations I and II LLCs
Debt Instrument [Line Items]
Aggregate principal amount																		2,551,855		$ 2,551,855
Convertible debt, number of shares (in shares) \| shares																				200,600
Interest payable																		318,718		$ 318,718
Senior Secured Term Loan Agreement \| Convertible debt \| Material Impact \| Related Party
Debt Instrument [Line Items]
Notes payable outstanding				4,224,983														4,353,665		4,353,665
Senior Secured Term Loan Agreement \| Convertible debt \| ATW Special Situations I LLC \| Related Party
Debt Instrument [Line Items]
Notes payable outstanding				2,933,362														1,643,933		1,643,933
SBA loan \| Notes Payable to Banks
Debt Instrument [Line Items]
Total				0														485,300		485,300
Notes payable outstanding																		485,300		485,300
SBA loan \| Notes Payable to Banks \| SeaTrepid International, L.L.C
Debt Instrument [Line Items]
Aggregate principal amount																											$ 485,300
Bears interest rate																											3.75%
Ameristate loan \| Notes Payable to Banks
Debt Instrument [Line Items]
Total				$ 0														1,891,335		1,891,335
Notes payable outstanding																		$ 1,891,335		$ 1,891,335
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]
Aggregate principal amount																	$ 2,335,000
Percentage of promissory note																	2.50%