8. SHORT-TERM LINE OF CREDIT (Details Narrative) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Short-Term Line Of Credit Details Narrative
Revolving line of credit increased			$ 5,000,000
Percentage of domestic and foreign accounts receivable			75.00%
Percentage of inventory			40.00%
Interest rate on amounts advanced			3.75%
Secured loan	0	0
Short-term borrowings outstanding	$ 1,400,000	$ 1,205,000

Custom Element.

No definition available.

Name:	FSI_PercentageOfDomesticAndForeignAccountsReceivable
Namespace Prefix:	FSI_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Custom Element.

+ References

No definition available.

+ Details

Name:	FSI_PercentageOfInventory
Namespace Prefix:	FSI_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	FSI_ShorttermLineOfCreditDetailsNarrativeAbstract
Namespace Prefix:	FSI_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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-Name Regulation S-X (SX)

-Number 210

-Section 02

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Sum of the carrying amounts at the balance sheet date of short-term borrowings not otherwise specified in the taxonomy having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

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-Paragraph 1

-Subparagraph (SX 210.5-02.19(a)(7))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

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-Name Accounting Standards Codification

-Topic 944

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant