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Other Investments - Additional Information (Detail) | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 USD ($) | Dec. 31, 2016 USD ($) Agreement | Dec. 31, 2014 USD ($) | Dec. 31, 2008 USD ($)
Variable Interest Entity [Line Items] |  |  |  |
Preferred stock, redemption terms |  | Redemption was effected through the exchange of a share of preferred stock for (a) the right to receive the preference value in cash upon surrender of the preferred shares and (b) the non-transferable right to receive certain cash payments as additional consideration, after a period of 16 months, associated with (i) the release by Intersil of some or all of the $2,625,000 portion of total consideration held in escrow by Intersil for potential funding of indemnification and related obligations made by GWS and its selling shareholders and (ii) additional consideration of up to $4,000,000, payable in the event Intersil achieved certain revenue goals related to GWS products. |  |
Maximum period to receive non-transferable right as cash |  | 16 months |  |
Consideration held in escrow |  | $ 2,625,000 |  |
Additional consideration payable |  | $ 4,000,000 |  |
Ownership interest in investment |  | 27.00% |  |
Great Wall Semiconductor Corporation (GWS) [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Gross investment |  | $ 4,999,719 |  | $ 0
Number of supply agreements with GWS | Agreement |  | 2 |  |
Purchase of components under agreement | $ 1,662,000 |  | $ 2,146,000 |

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- Definition The redemption terms of preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity. The redemption features of this capital stock are solely within the control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 + Details
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