Shelf Registration Statement (Details Textual) $ in Millions	Nov. 16, 2017 USD ($)
Stock Offering [Abstract]
Aggregate amount of common stock	$ 125

Value of Securities Permitted For Issuance Under Shelf Registration

No definition available.

Name:	mxwl_ValueofSecuritiesPermittedForIssuanceUnderShelfRegistration
Namespace Prefix:	mxwl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant