Quantum Corporation Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ / shares in Units, $ in Thousands				12 Months Ended
	Jun. 04, 2026 USD ($)	Jun. 01, 2026 USD ($) $ / shares shares	Aug. 15, 2024 $ / shares	Mar. 31, 2026 USD ($) region segment vendor $ / shares shares	Mar. 31, 2025 USD ($) vendor $ / shares shares	Mar. 31, 2024 USD ($) shares	Aug. 26, 2024 shares	Aug. 25, 2024 shares
Concentration Risk
Common stock, par value (in dollars per share) \| $ / shares			$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding (in shares) \| shares				14,638,000	6,962,000		4,800,000	95,900,000
Net cash used in operating activities				$ (37,856)	$ (23,613)
Net loss				$ (101,046)	(115,091)
Performance obligation, term				45 days
Capitalized contract cost				$ 2,300	2,300
Capitalized contract cost, amortization				1,300	1,300
Intangible asset				0	281
Intangible assets amortization expense				300	1,400
Advertising expense				1,900	2,000
Shipping and handling fees				$ 11,900	$ 6,800
Number of major vendors \| vendor				2	2
Number of reportable segments \| segment				1
Number of geographic regions \| region				3
Employer contributions					$ 100	$ 300
Software, Internally Developed and Purchased
Concentration Risk
Intangible asset				$ 0	1,000
Intangible assets amortization expense				$ 1,900	$ 1,800
Subsequent event
Concentration Risk
Repayments of long-term debt	$ 57,800
Common Stock
Concentration Risk
Common stock, shares outstanding (in shares) \| shares				14,638,000	6,962,000	4,792,000
Private Placement \| Subsequent event
Concentration Risk
Common stock, par value (in dollars per share) \| $ / shares		$ 0.01
Private Placement \| Common Stock \| Subsequent event
Concentration Risk
Number of shares issued in transaction (in shares) \| shares		10,615,712
Proceeds from the sales of stock		$ 94,700
Software
Concentration Risk
Estimated useful lives of the assets (years)				10 years
Minimum
Concentration Risk
Stock split conversion ratio			0.05
Product warranty term (years)				1 year
Finite lived assets useful life (years)				2 years
Sales commission, contract term (years)				1 year
Maximum
Concentration Risk
Stock split conversion ratio			0.2
Product warranty term (years)				3 years
Finite lived assets useful life (years)				4 years
Sales commission, contract term (years)				7 years