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Cash and Cash Equivalents and Restricted Cash (Details) $ in Thousands, ¥ in Millions | Feb. 10, 2017 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 26, 2016 CNY (¥) | Jun. 30, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 04, 2015 USD ($)
--- | --- | --- | --- | --- | --- | --- | ---
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |
Total cash and cash equivalents |  | $ 49,695 | $ 50,611 |  | $ 49,445 | $ 52,966 |
Restricted Cash [Abstract] |  |  |  |  |  |  |
Long-term restricted cash |  | 4,716 | 4,600 |  |  |  |
Disposed of by sale | Guangzhou Factory |  |  |  |  |  |  |
Restricted Cash [Abstract] |  |  |  |  |  |  |
Long-term restricted cash |  | 4,700 |  | ¥ 32 |  |  |
Surety bond |  |  |  |  |  |  |
Restricted Cash [Abstract] |  |  |  |  |  |  |
Restricted cash |  |  |  |  |  |  | $ 4,600
Return of surety bond | $ 4,600 |  |  |  |  |  |
United States |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |
Total cash and cash equivalents |  | 6,370 | 3,277 |  |  |  |
People's Republic of China (PRC) |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |
Total cash and cash equivalents |  | 17,225 | 22,142 |  |  |  |
Asia (excluding the PRC) |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |
Total cash and cash equivalents |  | 4,771 | 5,260 |  |  |  |
Europe |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |
Total cash and cash equivalents |  | 17,170 | 19,630 |  |  |  |
South America |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |
Total cash and cash equivalents |  | $ 4,159 | $ 302 |  |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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