Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2021	Oct. 01, 2021
Assets, Current [Abstract]
Cash and cash equivalents	$ 273,396	$ 156,537
Short-term investments	204,314	188,365
Accounts Receivable, after Allowance for Credit Loss, Current	97,444	84,570
Inventories	88,538	82,699
Prepaid and other current assets	7,872	9,365
Total current assets	671,564	521,536
Property and equipment, net	120,773	120,526
Goodwill	313,898	314,240
Intangible assets, net	75,398	84,685
Deferred income taxes	38,883	39,516
Other investments	2,500	15,342
Other long-term assets	37,102	38,300
Total assets	1,260,118	1,134,145
Current liabilities:
Finance lease liabilities	921	958
Accounts payable	33,936	28,712
Accrued liabilities	62,334	63,374
Total current liabilities	97,191	93,044
Finance lease liabilities	27,795	28,037
Financing obligation, less current portion	9,175	8,720
Long-term debt	564,686	492,097
Other long-term liabilities	36,497	40,511
Total liabilities	735,344	662,409
Stockholders’ equity:
Common stock	70	69
Treasury stock, at cost	(330)	(330)
Accumulated other comprehensive income	3,209	4,150
Additional paid-in capital	1,177,239	1,269,601
Accumulated deficit	(655,414)	(801,754)
Total stockholders’ equity	524,774	471,736
Total liabilities and stockholders' equity	$ 1,260,118	$ 1,134,145

Financing Obligation, Property, Plant And Equipment, Noncurrent

No definition available.

Name:	mtsi_FinancingObligationPropertyPlantAndEquipmentNoncurrent
Namespace Prefix:	mtsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).