XML 23 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2014 Securities | Mar. 31, 2013 | Mar. 31, 2014 Securities | Mar. 31, 2013 | Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |  |
Number of securities below amortized cost basis | 34 |  |  | 34 |  |  |  |
Number of securities | 72 |  |  | 72 |  |  |  |
Proceeds from maturities of marketable securities | $ 6,700 |  | $ 20,700 | $ 13,778 |  | $ 38,161 |  |
Available-for-sale securities, amortized cost basis | 55,850 | [1] |  | 55,850 | [1] |  | 64,471 | [2]
Available-for-sale securities, unrealized gains | 26 |  |  | 26 |  |  | 10 |
Available-for-sale debt securities, unrealized losses | (37) |  |  | (37) |  |  | (86) |
Available-for-sale marketable securities, fair value | 55,839 | [1] |  | 55,839 | [1] |  | 64,395 | [2]
Purchased and accrued interest | 583 |  |  | 583 |  |  | 629 |
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months | 24,585 |  |  | 24,585 |  |  | 48,544 |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months | (26) |  |  | (26) |  |  | (85) |
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 11,477 |  |  | 11,477 |  |  | 2,001 |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer | (11) |  |  | (11) |  |  | (1) |
Current Assets |  |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |  |
Available-for-sale securities, next twelve months, maximum year mature | 1 year |  |  | 1 year |  |  |  |
Available-for-sale securities, amortized cost basis | 45,048 | [1] |  | 45,048 | [1] |  | 47,029 | [2]
Available-for-sale securities, unrealized gains | 11 |  |  | 11 |  |  | 10 |
Available-for-sale debt securities, unrealized losses | (24) |  |  | (24) |  |  | (33) |
Available-for-sale marketable securities, fair value | 45,035 | [1] |  | 45,035 | [1] |  | 47,006 | [2]
Non-current Assets |  |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |  |
Available-for-sale securities, year two through five, maximum year mature | 3 years |  |  | 3 years |  |  |  |
Available-for-sale securities, amortized cost basis | 10,802 | [1] |  | 10,802 | [1] |  | 17,442 | [2]
Available-for-sale securities, unrealized gains | 15 |  |  | 15 |  |  | 0 |
Available-for-sale debt securities, unrealized losses | (13) |  |  | (13) |  |  | (53) |
Available-for-sale marketable securities, fair value | 10,804 | [1] |  | 10,804 | [1] |  | 17,389 | [2]
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 | 21,587 |  |  | 21,587 |  |  | 29,911 |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months | (24) |  |  | (24) |  |  | (35) |
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 10,730 |  |  | 10,730 |  |  | 2,001 |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer | (8) |  |  | (8) |  |  | (1) |
Corporate Bonds | Current Assets |  |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |  |
Available-for-sale securities, amortized cost basis | 36,180 | [1] |  | 36,180 | [1] |  | 35,161 | [2]
Available-for-sale securities, unrealized gains | 10 |  |  | 10 |  |  | 10 |
Available-for-sale debt securities, unrealized losses | (24) |  |  | (24) |  |  | (30) |
Available-for-sale marketable securities, fair value | 36,166 | [1] |  | 36,166 | [1] |  | 35,141 | [2]
Corporate Bonds | Non-current Assets |  |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |  |
Available-for-sale securities, amortized cost basis | 2,050 | [1] |  | 2,050 | [1] |  | 6,439 | [2]
Available-for-sale securities, unrealized gains | 0 |  |  | 0 |  |  | 0 |
Available-for-sale debt securities, unrealized losses | (8) |  |  | (8) |  |  | (6) |
Available-for-sale marketable securities, fair value | 2,042 | [1] |  | 2,042 | [1] |  | 6,433 | [2]
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 | 2,998 |  |  | 2,998 |  |  | 12,451 |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months | (2) |  |  | (2) |  |  | (49) |
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer | 747 |  |  | 747 |  |  | 0 |
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer | (3) |  |  | (3) |  |  | 0 |
Certificates of Deposit | Current Assets |  |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |  |
Available-for-sale securities, amortized cost basis | 2,752 | [1] |  | 2,752 | [1] |  | 1,753 | [2]
Available-for-sale securities, unrealized gains | 0 |  |  | 0 |  |  | 0 |
Available-for-sale debt securities, unrealized losses | 0 |  |  | 0 |  |  | (2) |
Available-for-sale marketable securities, fair value | 2,752 | [1] |  | 2,752 | [1] |  | 1,751 | [2]
Certificates of Deposit | Non-current Assets |  |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |  |
Available-for-sale securities, amortized cost basis | 8,752 | [1] |  | 8,752 | [1] |  | 11,003 | [2]
Available-for-sale securities, unrealized gains | 15 |  |  | 15 |  |  | 0 |
Available-for-sale debt securities, unrealized losses | (5) |  |  | (5) |  |  | (47) |
Available-for-sale marketable securities, fair value | 8,762 | [1] |  | 8,762 | [1] |  | 10,956 | [2]
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 | 6,116 | [1] |  | 6,116 | [1] |  | 10,115 | [2]
Available-for-sale securities, unrealized gains | 1 |  |  | 1 |  |  | 0 |
Available-for-sale debt securities, unrealized losses | 0 |  |  | 0 |  |  | (1) |
Available-for-sale marketable securities, fair value | $ 6,117 | [1] |  | $ 6,117 | [1] |  | $ 10,114 | [2]
[1] | Included in amortized cost and fair value is purchased and accrued interest of $583
[2] | Included in amortized cost and fair value is purchased and accrued interest of $629

X
- Definition Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized loss on investments in available-for-sale debt securities impacting investments. + References No definition available. + Details
Name: | dgii_AvailableForSaleDebtSecuritiesGrossUnrealizedGainAccumulatedinInvestments
Namespace Prefix: | dgii_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale debt securities impacting investments. + References No definition available. + Details
Name: | dgii_AvailableForSaleDebtSecuritiesGrossUnrealizedLossAccumulatedInvestments
Namespace Prefix: | dgii_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer impacting investments. + References No definition available. + Details
Name: | dgii_AvailableForSaleSecuritiesContinousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments
Namespace Prefix: | dgii_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of accumulated pre-tax unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months impacting investments. + References No definition available. + Details
Name: | dgii_AvailableForSaleSecuritiesContinousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments
Namespace Prefix: | dgii_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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: | instant

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: | instant

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 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 No definition available. + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
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 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 3: 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 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