XML 30 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Marketable Investments - Summary of Maturity Periods of the Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
FY 2014 | $ 3,531 |
FY 2015 | 26,201 |
FY 2016 | 16,192 |
Thereafter | 9,573 |
Total | 55,497 | 81,013
State and Municipal Obligations [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
FY 2015 | 1,982 |
Total | 1,982 | 6,814
Federal Agency and Corporate Obligations [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
FY 2014 | 3,531 |
FY 2015 | 24,219 |
FY 2016 | 16,192 |
Thereafter | 9,573 |
Total | $ 53,515 | $ 74,199

X
- Definition Fair value of available-for-sale debt securities maturing after the second fiscal year following the current fiscal year. + References No definition available. + Details
Name: | forr_AvailableForSaleSecuritiesDebtMaturitiesThereafterFairValue
Namespace Prefix: | forr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of available-for-sale debt securities maturing in the second fiscal year following the current fiscal year. + References No definition available. + Details
Name: | forr_AvailableForSaleSecuritiesDebtMaturitiesYearThreeFairValue
Namespace Prefix: | forr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of available-for-sale debt securities maturing in the fiscal year following the current fiscal year. + References No definition available. + Details
Name: | forr_AvailableForSaleSecuritiesDebtMaturitiesYearTwoFairValue
Namespace Prefix: | forr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity 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 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 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 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of available-for-sale debt securities maturing in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRemainderOfFiscalYearFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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