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Cash and Cash Equivalents and Restricted Cash (Details) $ in Thousands, ¥ in Millions		9 Months Ended
	Feb. 10, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Sep. 26, 2016 CNY (¥)	Dec. 31, 2015 USD ($)	Sep. 04, 2015 USD ($)
Cash and Cash Equivalents [Line Items]
Total cash and cash equivalents		$ 48,560	$ 48,141	$ 50,611		$ 52,966
Restricted Cash [Abstract]
Increase in restricted cash		0	$ (4,797)
Long-term restricted cash		0		4,600
Disposed of by sale | Guangzhou Factory
Restricted Cash [Abstract]
Long-term restricted cash		4,800			¥ 32
Surety bond
Restricted Cash [Abstract]
Restricted cash							$ 4,600
Increase in restricted cash	$ 4,600
United States
Cash and Cash Equivalents [Line Items]
Total cash and cash equivalents		4,795		3,277
People's Republic of China (PRC)
Cash and Cash Equivalents [Line Items]
Total cash and cash equivalents		22,120		22,142
Asia (excluding the PRC)
Cash and Cash Equivalents [Line Items]
Total cash and cash equivalents		846		5,260
Europe
Cash and Cash Equivalents [Line Items]
Total cash and cash equivalents		13,317		19,630
South America
Cash and Cash Equivalents [Line Items]
Total cash and cash equivalents		$ 7,482		$ 302

X

- 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.

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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.

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