Note 13 - Commitments and Contingencies (Details Textual) $ in Millions	Dec. 31, 2024 USD ($)
Prepaid Wafer Purchase, Current	$ 60

Amount of prepaid wafer purchase, classified as current.

No definition available.

Name:	mpwr_PrepaidWaferPurchaseCurrent
Namespace Prefix:	mpwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant