Related Party Transactions and Relationships and Transactions With Certain Other Parties (Details Textual) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual)
Purchase of transportation services	$ 413,000	[1]	$ 1,105,000	[1]	$ 1,041,000	[1]	$ 1,666,000	[1]
Guarantee fee as a percentage of loan principal					0.30%
Loan guarantee fees	19,000	[2]	113,000	[2]	42,000	[2]	204,000	[2]
Amount due from related parties	295,000	[3]			295,000	[3]			40,000	[3]
Ningbo Kunde [Member]
Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual)
Sales of products (e)	7,000,000		41,000,000		38,000,000		53,000,000
Purchase of transportation services	8,000,000		13,100,000		2,700,000		13,100,000
Loan guarantee fees							370,000
Ningbo Xinhe [Member]
Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual)
Purchase of transportation services	400,000		1,100,000		1,040,000		1,700,000
Amount due from related parties	246,000				246,000
Ningbo Pacific [Member]
Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual)
Loan guarantee fees	20,000		100,000		40,000		200,000
Ningbo Kewei [Member]
Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual)
Purchase of transportation services	8,000,000				32,000,000
Loan guarantee fees	340,000		200,000		620,000
Amounts due to these parties	1,000,000				1,000,000
Mr. Chunfeng Tao [Member]
Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual)
Amount due from related parties	49,000				49,000				40,000
Ningbo Litong [Member]
Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual)
Sales of products (e)	1,800,000		7,000,000		12,100,000		17,000,000
Purchase of transportation services			8,800,000				9,200,000
Loan guarantee fees	240,000		180,000		470,000		370,000
Amount due from related parties	$ 2,600,000				$ 2,600,000

[1] The Group purchased transportation services of approximately $0.4 million and $1.1 million from Ningbo Xinhe during each of the three months ended June 30, 2013 and 2012.

[2] Guarantees for Bank Loans

[3] Amounts due from related parties consist of the following.