Quantum Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

RESTRUCTURING CHARGES - Narrative (Details)

RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands	1 Months Ended		2 Months Ended	3 Months Ended			6 Months Ended
RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands	Apr. 30, 2016 position	Nov. 30, 2015 position	Dec. 31, 2015 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 position	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring costs				$ 31		$ 15	$ 2,366	$ 2,067
Payments for restructuring				611		960	1,494	2,328
Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring costs				29		(39)	1,599	1,450
Payments for restructuring				473		635	945	1,664
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring costs				2		54	758	617
Payments for restructuring				$ 138		$ 325	549	664
Fiscal 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Positions eliminated (positions) \| position					49
Payments for restructuring							1,000
Fiscal 2018 Restructuring Plan \| Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring costs							1,600
Fiscal 2017 April Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Positions eliminated (positions) \| position	29
Payments for restructuring								1,500
Fiscal 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Positions eliminated (positions) \| position		65
Restructuring costs			$ 2,000
Fiscal 2016 Restructuring Plan \| Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring costs							1,600	1,500
Fiscal 2016 Restructuring Plan \| Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring costs							$ 800	$ 600