8. Notes Payable and Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Notes payable and long-term debt total	$ 37,494	$ 26,108
Current portion of notes payable and long-term debt	(18,721)	(9,591)
Long term portion of notes payable and long-term debt	18,773	19,057
Bank acceptance notes	1,445	1,271
Revolving Line of Credit 1
Notes payable and long-term debt total	15,000	15,000
Debt maturity date	Jul. 15, 2017
Interest rate	LIBOR plus 2.75%
Term loan 1
Notes payable and long-term debt total	4,906	5,000
Debt maturity date	Jul. 19, 2019
Interest rate	LIBOR plus 2.75%
Revolving Line of Credit 2
Notes payable and long-term debt total	2,769	0
Debt maturity date	Nov. 15, 2015
Interest rate	interest rate swap index 1.5%, or 2.40%
Revolving Line of Credit 3
Notes payable and long-term debt total	3,642	3,605
Debt maturity date	Feb. 06, 2016
Interest rate	LIBOR plus 1.2%
Revolving Line of Credit 4
Notes payable and long-term debt total	2,351	0
Debt maturity date	Feb. 06, 2016
Interest rate	LIBOR plus 1.7%
Revolving Line of Credit 5
Notes payable and long-term debt total	3,572	3,536
Debt maturity date	Nov. 27, 2015
Interest rate	Interest Rate Index plus 0.41% or LIBOR plus 1.28%
Note Payable
Notes payable and long-term debt total	255	443
Debt maturity date	Jul. 30, 2015
Interest rate	4.95% interest
Revolving Line of Credit 5
Notes payable and long-term debt total	2,557	1,064
Debt maturity date	May 31, 2015
Interest rate	interest ranged from 0.76% to 1.66%
Revolving Line of Credit 7
Notes payable and long-term debt total	2,442	0
Debt maturity date	Mar. 17, 2016
Interest rate	interest at 108% of China Prime rate, or 5.79%
Bank Acceptance Notes Payable
Notes payable and long-term debt total	$ 1,445	$ 1,271
Debt maturity date	Sep. 30, 2015
Interest rate	zero percent interest rate, a 30% guarantee deposit of $434