Related Party Transactions (Details)	1 Months Ended		3 Months Ended
	Apr. 30, 2016 USD ($)	Apr. 30, 2014 USD ($)	Mar. 31, 2016 USD ($) ft² installment	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Aug. 31, 2011 USD ($) item
Related Party Transaction [Line Items]
Related party notes receivable - long term			$ 1,792,000		$ 1,781,000
Accounts payable			8,034,000		6,460,000
Accounts receivable			$ 19,711,000		18,468,000
Area of leased property (in square feet) | ft²			19,467
Nanjing Jin Mei Gallium Co., Ltd [Member]
Related Party Transaction [Line Items]
Income from agency sales			$ 0	$ 1,000
Beijing JiYa Semiconductor Material Co., Ltd [Member]
Related Party Transaction [Line Items]
Amount of loan under note agreement						$ 1,600,000
Number of equity method investees to whom loan was granted | item						1
Term of loan			2 years 10 months
Number of installments | installment			3
Related party notes receivable - long term			$ 1,600,000		1,600,000
Accounts payable			2,700,000		2,400,000
Accounts receivable			476,000		473,000
Beijing Tongmei Xtal Technology [Member]
Related Party Transaction [Line Items]
Accounts payable			$ 70,000		70,000
Area of leased property (in square feet) | ft²			22,081
Lease term			10 years
Annual lease payment			$ 24,000
Increase in annual lease payment at each third year anniversary (in hundredths)			5.00%
Payments to purchase materials			$ 115,000
Additional loan paid to related party		$ 47,000
Interest on loan (in hundredths)			6.15%
Principal and interest on loan			$ 52,000
Beijing Kaide Quartz Co. Ltd [Member]
Related Party Transaction [Line Items]
Accounts payable			$ 381,000		$ 379,000
Beijing BoYu Semiconductor Vessel Craftwork Technology Co [Member] | Scenario, Forecast [Member]
Related Party Transaction [Line Items]
Interest on loan (in hundredths)	2.75%
Personal loan	$ 186,000