XML 42 R27.htm IDEA: XBRL DOCUMENT
v3.20.4

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
--- | ---
Dec. 31, 2020
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS |
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | INFORMATION SERVICES GROUP, INC. SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Balance at |  | Charges to |  | ​ |  | Balance at |
​ | ​ | Beginning | ​ | Costs and | ​ | Additions/ | ​ | End of | ​
Description | ​ | of Period | ​ | Expenses | ​ | (Deductions) | ​ | Period | ​
Year ended December 31, 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for doubtful accounts | ​ | $ | 343 |  | 817 |  | (792) | ​ | $ | 368 | ​
Allowance for tax valuation | ​ | $ | 3,989 |  | 517 | ​ | (799) | ​ | $ | 3,707 | ​
Year ended December 31, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for doubtful accounts | ​ | $ | 401 |  | 75 |  | (133) | ​ | $ | 343 | ​
Allowance for tax valuation | ​ | $ | 4,209 |  | (141) |  | (79) | ​ | $ | 3,989 | ​
​

X
- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | srt_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock
Namespace Prefix: | srt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | srt_ValuationAndQualifyingAccountsAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration