Goodwill, Impairment Test Benchmark, Equity in Acquiree Company, Percent

No definition available.

Name:	dgii_GoodwillImpairmentTestBenchmarkEquityInAcquireeCompanyPercent
Namespace Prefix:	dgii_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Goodwill, Impairment Test Benchmark, Number of Identified Industries

+ References

No definition available.

+ Details

Name:	dgii_GoodwillImpairmentTestBenchmarkNumberofIdentifiedIndustries
Namespace Prefix:	dgii_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Market Capitalization

+ References

No definition available.

+ Details

Name:	dgii_MarketCapitalization
Namespace Prefix:	dgii_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage above fair value that an investor seeking to acquire control of an entity will pay, used as an input to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsControlPremium
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_GoodwillLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of fair value of reporting unit in excess of carrying amount.

+ References

No definition available.

+ Details

Name:	us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

+ Details

Name:	us-gaap_StockholdersEquity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Goodwill and Other Identifiable Intangible Assets, Net (Additional Information) (Details) $ in Thousands	Jun. 30, 2014 industry	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)
Goodwill [Line Items]
Market capitalization				$ 238,600
Carrying value		$ 285,516	$ 274,938	$ 270,600
Control premium percent	35.00%
Percent fair value in excess of carrying value of goodwill				19.00%
Target companies equity benchmark	50.00%
Number of industries encompasses similar products \| industry	3
Minimum
Goodwill [Line Items]
Control premium percent	30.00%
Maximum
Goodwill [Line Items]
Control premium percent	40.00%