XML 28 R18.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Revenue Recognition (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Revenue Recognition |
Deferred revenue |
|  | Year ended December 31, 2021 |
|  | Services Revenues |  |  | Products Revenue |  |  | Total Revenue |
Timing of revenue recognition: |  |  |  |  |  |  |  |  |
Products and services transferred over time |  | $ | 6,659,000 |  |  | $ | — |  |  | $ | 6,659,000 |
Products and services transferred at a point in time |  |  | 12,844,000 |  |  |  | — |  |  |  | 12,844,000 |
Total |  | $ | 19,503,000 |  |  | $ | — |  |  | $ | 19,503,000 |
|  |  | Year ended December 31, 2020 |
|  | Services Revenues |  |  | Products Revenue |  |  | Total Revenue |
Timing of revenue recognition: |  |  |  |  |  |  |  |  |  |  |  |
Products and services transferred over time |  | $ | 10,670,000 |  |  | $ | — |  |  | $ | 10,670,000 |
Products and services transferred at a point in time |  |  | 6,234,000 |  |  |  | 578,000 |  |  |  | 6,812,000 |
Total |  | $ | 16,904,000 |  |  | $ | 578,000 |  |  | $ | 17,482,000 |
Balance at December 31, 2020 |  | $ | 180,000 |
Reclassification of beginning deferred revenue to revenue, as a result of performance obligations satisfied |  |  | (180,000 | )
Cash received in advance and not recognized as revenue |  |  | 842,000 |
Balance at December 31, 2021 |  | $ | 842,000 |

X
- References No definition available. + Details
Name: | isig_ScheduleOfChangesInDeferredRevenueTableTextBlock
Namespace Prefix: | isig_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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