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Note 6 - Notes Receivable (Details Textual) - USD ($) |  | 3 Months Ended
--- | --- | ---
Sep. 18, 2017 | Dec. 31, 2017
Receivable Commitment to Lend | $ 1,500,000 |
Payments to Acquire Notes Receivable | 750,000 | $ 500,000
Financing Receivable, Gross |  | $ 1,250,000
Notes Receivable, Period Advances | $ 250,000 |
Notes Receivable, Stated Interest Rate | 6.00% |

X
- Definition The cash outflow related to notes receivable that may be required as periodic advances. + References No definition available. + Details
Name: | ins_NotesReceivablePeriodAdvances
Namespace Prefix: | ins_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The stated interest rate of notes receivable. + References No definition available. + Details
Name: | ins_NotesReceivableStatedInterestRate
Namespace Prefix: | ins_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The entire commitment to lend made by the company to another entity. + References No definition available. + Details
Name: | ins_ReceivableCommitmentToLend
Namespace Prefix: | ins_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash outflow to acquire an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among myriad other features and characteristics. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireNotesReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration