Note 3 - Acquisitions - Intangible Assets (Details) - USD ($)	Jun. 30, 2026	Mar. 31, 2026	Jan. 21, 2026	Mar. 31, 2025	Feb. 18, 2025
Amorphous Materials, LLC (“AML”) [Member]
Intangible asset acquired		$ 2,980,000	$ 2,980,000
G5 Infrared [Member]
Intangible asset acquired				$ 19,295,000	$ 13,752,000
Order or Production Backlog [Member]
Useful life, finite-lived intangible assets (Year)	1 year
Order or Production Backlog [Member] \| Amorphous Materials, LLC (“AML”) [Member]
Intangible asset acquired			$ 90,000
Useful life, finite-lived intangible assets (Year)			1 year
Order or Production Backlog [Member] \| G5 Infrared [Member]
Intangible asset acquired					$ 361,000
Useful life, finite-lived intangible assets (Year)					1 year
Developed Technology Rights [Member] \| Amorphous Materials, LLC (“AML”) [Member]
Intangible asset acquired			$ 930,000
Useful life, finite-lived intangible assets (Year)			10 years
Developed Technology Rights [Member] \| G5 Infrared [Member]
Intangible asset acquired					$ 4,801,000
Useful life, finite-lived intangible assets (Year)					10 years
Trade Names [Member] \| Amorphous Materials, LLC (“AML”) [Member]
Intangible asset acquired			$ 390,000
Useful life, finite-lived intangible assets (Year)			10 years
Trade Names [Member] \| G5 Infrared [Member]
Intangible asset acquired					$ 3,450,000
Useful life, finite-lived intangible assets (Year)					15 years
Customer Relationships [Member] \| Amorphous Materials, LLC (“AML”) [Member]
Intangible asset acquired			$ 1,570,000
Useful life, finite-lived intangible assets (Year)			10 years
Customer Relationships [Member] \| G5 Infrared [Member]
Intangible asset acquired					$ 5,140,000
Useful life, finite-lived intangible assets (Year)					15 years