Shelf Registration Statement (Details Textual) (USD $)	36 Months Ended
Jun. 30, 2017
Stock Offering (Textual) [Abstract]
Value of Securities Permitted to be Issued Under Shelf Registration	$ 125,000,000

Value of securities permitted to be issued under shelf registration.

No definition available.

Name:	mxwl_ValueOfSecuritiesPermittedToBeIssuedUnderShelfRegistration
Namespace Prefix:	mxwl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration