Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 34,079	$ 22,006
Restricted cash	932	775
Short-term investments	7,957	7,970
Accounts receivable - trade, net	24,968	22,089
Inventories	31,200	19,608
Prepaid expenses and other current assets	6,978	5,488
Total current assets	106,114	77,936
Property, plant and equipment, net	41,657	31,134
Land use rights, net	934	959
Intangible assets, net	3,841	851
Other assets, net	978	177
TOTAL ASSETS	153,524	111,057
Current liabilities
Current portion of notes payable and long-term debt	9,562	17,185
Accounts payable	22,631	15,010
Bank acceptance payable	2,377	2,347
Accrued liabilities	5,606	4,515
Total current liabilities	40,176	39,057
Notes payable and long-term debt, less current portion	67	8,923
Other long term liabilities	1,500	0
TOTAL LIABILITIES	41,743	47,980
Stockholders' equity (deficit):
Preferred Stock; 5,000 shares authorized; no shares issued and outstanding at June 30, 2014 and December 31, 2013, $0.001 par value	0	0
Common Stock; 45,000 shares authorized; 14,798 shares issued and outstanding at June 30, 2014, $0.001 par value; 12,644 shares issued and outstanding at December 31, 2013, $0.001 par value	15	13
Additional paid-in capital	190,861	144,023
Accumulated other comprehensive gain	2,224	2,364
Accumulated deficit	(81,319)	(83,323)
TOTAL STOCKHOLDERS' EQUITY	111,781	63,077
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 153,524	$ 111,057