Acquisition (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Dec. 31, 2014
Total purchase price:
Cash consideration paid to acquire ownership interest	$ 3,000
Assets
Goodwill		$ 646	$ 645
Fujian Qiaolong Special Purpose Vehicle Co., Ltd [Member]
Total purchase price:
Cash consideration paid to acquire ownership interest		3,007
Assets
Cash and cash equivalents		31
Current assets, net of cash acquired		8,428
Deferred tax asset		69
Property and equipment		3,694
Intangible assets		864
Goodwill		642
Total assets consolidated into the Company		13,728
Liabilities
Current liabilities, excluding current deferred tax liabilities		(7,352)
Deferred tax liabilities		(448)
Other liabilities		(128)
Total liabilities consolidated into the Company		(7,928)
Non-controlling interests at fair value		(2,793)
Total equity consolidated into the Company		$ (3,007)