Quarterly Financial Data - Additional Information (Details) $ in Millions	3 Months Ended
Dec. 31, 2019 USD ($)
Quarterly Financial Information Disclosure [Abstract]
Net discrete tax expense (benefits)	$ (1.0)

Income Tax Expense (Benefit) Specific to the Period

No definition available.

Name:	dgii_IncomeTaxExpenseBenefitSpecifictothePeriod
Namespace Prefix:	dgii_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration