XML 46 R56.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2014 Security | Sep. 30, 2013 | Sep. 30, 2012
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Number of securities below amortized cost basis | 32 |  |  |  |
Number of securities | 74 |  |  |  |
Proceeds from maturities of marketable securities | $ 47,420 |  | $ 63,089 |  | $ 65,533
Available-for-sale Securities, Amortized Cost Basis | 44,471 | [1] | 64,471 | [2] |
Unrealized gains | 17 |  | 10 |  |
Unrealized losses | (49) |  | (86) |  |
Available-for-sale marketable securities | 44,439 | [1] | 64,395 | [2] |
Purchased and accrued interest | 213 |  | 629 |  |
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months | 30,453 |  | 48,544 |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months | (47) |  | (85) |  |
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 748 |  | 2,001 |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer | (2) |  | (1) |  |
Current Assets |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale securities, next twelve months, maximum year mature | 1 year |  |  |  |
Available-for-sale Securities, Amortized Cost Basis | 32,918 |  | 47,029 |  |
Unrealized gains | 3 |  | 10 |  |
Unrealized losses | (23) |  | (33) |  |
Available-for-sale marketable securities | 32,898 |  | 47,006 |  |
Non-current Assets |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale Securities, year two through five, maximum year mature | 3 years |  |  |  |
Available-for-sale Securities, Amortized Cost Basis | 11,553 |  | 17,442 |  |
Unrealized gains | 14 |  | 0 |  |
Unrealized losses | (26) |  | (53) |  |
Available-for-sale marketable securities | 11,541 |  | 17,389 |  |
Corporate Bonds |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months | 23,475 |  | 29,911 |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months | (26) |  | (35) |  |
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 0 |  | 2,001 |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 0 |  | (1) |  |
Corporate Bonds | Current Assets |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale Securities, Amortized Cost Basis | 24,668 |  | 35,161 |  |
Unrealized gains | 1 |  | 10 |  |
Unrealized losses | (22) |  | (30) |  |
Available-for-sale marketable securities | 24,647 |  | 35,141 |  |
Corporate Bonds | Non-current Assets |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale Securities, Amortized Cost Basis | 2,051 |  | 6,439 |  |
Unrealized gains | 0 |  | 0 |  |
Unrealized losses | (4) |  | (6) |  |
Available-for-sale marketable securities | 2,047 |  | 6,433 |  |
Commercial Paper |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months | 3,998 |  |  |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months | (1) |  |  |  |
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 0 |  |  |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 0 |  |  |  |
Commercial Paper | Current Assets |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale Securities, Amortized Cost Basis | 3,998 |  |  |  |
Unrealized gains | 0 |  |  |  |
Unrealized losses | (1) |  |  |  |
Available-for-sale marketable securities | 3,997 |  |  |  |
Certificates of Deposit |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months | 2,980 |  | 12,451 |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months | (20) |  | (49) |  |
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 748 |  | 0 |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer | (2) |  | 0 |  |
Certificates of Deposit | Current Assets |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale Securities, Amortized Cost Basis | 4,252 |  | 1,753 |  |
Unrealized gains | 2 |  | 0 |  |
Unrealized losses | 0 |  | (2) |  |
Available-for-sale marketable securities | 4,254 |  | 1,751 |  |
Certificates of Deposit | Non-current Assets |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale Securities, Amortized Cost Basis | 9,502 |  | 11,003 |  |
Unrealized gains | 14 |  | 0 |  |
Unrealized losses | (22) |  | (47) |  |
Available-for-sale marketable securities | 9,494 |  | 10,956 |  |
Government Municipal Bonds |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months |  |  | 6,182 |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months |  |  | (1) |  |
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer |  |  | 0 |  |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer |  |  | 0 |  |
Government Municipal Bonds | Current Assets |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale Securities, Amortized Cost Basis |  |  | 10,115 |  |
Unrealized gains |  |  | 0 |  |
Unrealized losses |  |  | (1) |  |
Available-for-sale marketable securities |  |  | $ 10,114 |  |
[1] | Included in amortized cost and fair value is purchased and accrued interest of $213.
[2] | Included in amortized cost and fair value is purchased and accrued interest of $629

X
- Definition Available-for sale Securities, Debt Maturities, Year Two Through Five, this is the maximum year (up to Five). + References No definition available. + Details
Name: | dgii_AvailableforsaleSecuritiesDebtMaturitiesYearTwoThroughFiveMaximumYearMature
Namespace Prefix: | dgii_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Available-For-Sale Securities, Next Twelve Months, Maximum Year Mature + References No definition available. + Details
Name: | dgii_AvailableForSaleSecuritiesNextTwelveMonthsMaximumYearMature
Namespace Prefix: | dgii_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Available-for-sale Securities, Purchased and accrued interest + References No definition available. + Details
Name: | dgii_AvailableForSaleSecuritiesPurchasedAndAccruedInterest
Namespace Prefix: | dgii_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available-for-sale Securities, Total Number of Securities + References No definition available. + Details
Name: | dgii_AvailableForSaleSecuritiesTotalNumberOfSecurities
Namespace Prefix: | dgii_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (b)-(g) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration