Quantum Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

DEBT - Narrative (Details)

DEBT - Narrative (Details)			1 Months Ended		12 Months Ended
DEBT - Narrative (Details)	Apr. 15, 2016 USD ($)	Oct. 05, 2015 USD ($)	Nov. 06, 2012 USD ($)	Oct. 31, 2012 USD ($) $ / shares	Mar. 31, 2016 USD ($) $ / shares	Mar. 31, 2015 USD ($) $ / shares	Mar. 31, 2014 USD ($) $ / shares	Nov. 15, 2015 USD ($)	Jan. 28, 2015 USD ($)	Apr. 24, 2014 USD ($)	Mar. 11, 2014 USD ($)	Mar. 29, 2012 USD ($)	Mar. 31, 2011 USD ($)	Nov. 15, 2010 USD ($) $ / shares
Debt Instrument [Line Items]
Loss on debt extinguishment					$ 394,000	$ 1,295,000	$ 0
Borrowings of long-term debt, net					68,920,000	0	0
Net Cash Provided by (Used in) Financing Activities					(18,724,000)	(48,641,000)	1,285,000
Accrued interest paid					6,873,000	8,498,000	$ 8,247,000
Long-term debt					62,709,000	0
4.50% Convertible Subordinated Debt
Debt Instrument [Line Items]
Interest rate per annum on the principal amount (as a percent)				4.50%
Debt issuance fees					$ 2,300,000	$ 2,300,000
Principal amount outstanding				$ 60,000,000
Debt due date					Nov. 15, 2017
Additional aggregate principal amount of debt issued			$ 10,000,000
Conversion rate				607.1645
Conversion ratio applied per principal amount				$ 1,000
Conversion price (usd per share) \| $ / shares				$ 1.65	$ 1.65	$ 1.65	$ 1.65
Latest date that investors may convert notes into common stock					Nov. 14, 2017
Repurchased principal amount		$ 81,000,000						$ 2,800,000
Repurchase amount		82,400,000
3.50% Convertible Subordinated Debt
Debt Instrument [Line Items]
Interest rate per annum on the principal amount (as a percent)								3.50%						3.50%
Debt issuance fees													$ 5,000,000
Principal amount outstanding														$ 135,000,000
Debt due date					Nov. 15, 2015
Conversion price (usd per share) \| $ / shares					$ 4.33	$ 4.33	$ 4.33							$ 4.33
Repurchased principal amount									$ 50,000,000		$ 1,300,000
Repurchase amount									$ 51,000,000		$ 1,300,000
Interest Payable		1,100,000
Loss on debt extinguishment		400,000			$ 1,300,000
Loss from notes purchased		300,000			1,000,000
Write-off of unamortized debt issuance costs		100,000			300,000
Accrued interest paid					$ 400,000
Wells Fargo Credit Agreement
Debt Instrument [Line Items]
Capitalized debt issuance costs												$ 1,000,000
Borrowings of long-term debt, net		66,100,000
Net Cash Provided by (Used in) Financing Activities		$ 16,300,000
Fixed charge coverage ratio										1.5
Amount of liquidity to be below for covenant to be applicable										$ 25,000,000
Line of credit facility, fixed charge coverage ratio					1.2
Line of credit facility, fixed charge coverage ratio, period when covenant is applied					12 months
Line of credit facility, amount of liquidity required to avoid audits					$ 20,000,000
Amount of borrowings, if exceeded, increase the filing of compliance certificates to monthly rather than quarterly					$ 5,000,000
Wells Fargo Credit Agreement \| Base rate \| Minimum
Debt Instrument [Line Items]
Interest rate margin					1.00%
Wells Fargo Credit Agreement \| Base rate \| Maximum
Debt Instrument [Line Items]
Interest rate margin					1.50%
Wells Fargo Credit Agreement \| LIBOR \| Minimum
Debt Instrument [Line Items]
Interest rate margin					2.00%
Wells Fargo Credit Agreement \| LIBOR \| Maximum
Debt Instrument [Line Items]
Interest rate margin					2.50%
Wells Fargo Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Amount of liquidity to be below for covenant to be applicable					$ 15,000,000
Line of credit minimum liquidity at all times when covenant is applied					10,000,000
Minimum Excess Availability					5,000,000
Maximum borrowing capacity					$ 8,300,000
Weighted average interest rate					3.18%
Outstanding letters of credit					$ 1,000,000.0
Line of credit facility, percent commitment fee on undrawn amounts					0.375%
Long-term debt					$ 65,700,000
Debt instrument minimum percent of debt holders requested to give written notice of default					25.00%
Increase in amount of excess availability requirement					$ 1,500,000
Subsequent event \| Wells Fargo Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing amount	$ 75,000,000
Line of credit facility, expiration date	Aug. 10, 2017