Subsequent Events (Details)	1 Months Ended
	Jul. 31, 2017 USD ($) entity	Dec. 31, 2016 USD ($)
Subsequent Event [Line Items]
Related party notes receivable - long term		$ 157,000
Nanjing JinMei Gallium Co., Ltd | Subsequent Event [Member]
Subsequent Event [Line Items]
Number of consolidated joint ventures | entity	1
Estimated costs of land use rights	$ 6,000,000
Nanjing JinMei Gallium Co., Ltd | Subsequent Event [Member] | Beijing Tongmei Xtal Technology
Subsequent Event [Line Items]
Interest rate (as a percent)	4.90%
Related party notes receivable - long term	$ 738,000