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Equity Method Investments - Additional Information (Detail) £ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 30, 2015 USD ($) shares | Nov. 30, 2015 GBP (£) shares | Oct. 31, 2014 USD ($) shares | Jul. 31, 2014 USD ($) shares | Jul. 31, 2014 GBP (£) shares | Feb. 28, 2014 USD ($) shares | Feb. 28, 2014 GBP (£) shares | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) Position | Dec. 31, 2014 USD ($) | Aug. 02, 2016
Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount raised by equity investee on shares issued |  |  |  |  |  |  |  | $ 241 | $ 317 | $ 1,666 |
Gain (Loss) from dilution of equity method investment |  |  |  |  |  |  |  |  | $ (7) | $ 954 |
Warrants exercised amount |  |  | $ 500 |  |  |  |  |  |  |  |
Number of board seats retained | Position |  |  |  |  |  |  |  |  | 1 |  |
Number of board seats available | Position |  |  |  |  |  |  |  |  | 5 |  |
TyraTech Inc. |  |  |  |  |  |  |  |  |  |  |
Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares issued by equity investee | shares | 105,333,333 | 105,333,333 |  | 50,000,000 | 50,000,000 | 37,391,763 | 37,391,763 |  |  |  |
Amount raised by equity investee on shares issued | $ 4,800 | £ 3,200 |  | $ 5,900 | £ 3,500 | $ 3,100 | £ 1,870 |  |  |  |
Warrants exercised shares | shares |  |  | 6,155,000 |  |  |  |  |  |  |  |
Equity investment ownership position |  |  |  |  |  |  |  | 15.11% | 15.11% |  |
Carrying value of equity investment |  |  |  |  |  |  |  | $ 2,184 |  |  |
Quoted market value of equity investment |  |  |  |  |  |  |  | $ 1,292 |  |  |
Huifeng/AMVAC Innovation Co., Ltd. |  |  |  |  |  |  |  |  |  |  |
Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity investment ownership position |  |  |  |  |  |  |  |  |  |  | 50.00%

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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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