v3.5.0.2

Stockholders' Equity (Details) - $ / shares	6 Months Ended
Stockholders' Equity (Details) - $ / shares	Jun. 30, 2016	Dec. 31, 2015
Class A Common Stock for Class B Common Stock [Member]
Class of Stock [Line Items]
Conversion of stock, number of shares that can be received in a conversion	1
Common Class A [Member]
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	3,000,000	3,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Class B [Member]
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	1,500,000	1,500,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01

Conversion of Stock, Number of Shares That Can Be Received in a Conversion

+ References

No definition available.

+ Details

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Namespace Prefix:	iss_
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Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

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- Details

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- Details

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- Details

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INTERFACE SECURITY SYSTEMS HOLDINGS INC 10-Q