CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 9,909	$ 32,175
Restricted cash	1,048	509
Short-term investments	8,190	8,189
Accounts receivable - trade, net	29,962	31,589
Inventories	43,565	33,780
Notes receivable	651	980
Prepaid expenses and other current assets	7,814	6,017
Total current assets	101,139	113,239
Cash restricted for construction in progress	8,993	0
Property, plant and equipment, net	69,512	64,808
Land use rights, net	920	930
Intangible assets, net	3,828	3,833
Other assets, net	1,823	860
TOTAL ASSETS	186,215	183,670
Current liabilities
Current portion of notes payable and long-term debt	18,721	9,591
Accounts payable	25,301	30,799
Bank acceptance payable	1,445	1,271
Accrued liabilities	6,318	6,940
Total current liabilities	51,785	48,601
Notes payable and long-term debt, less current portion	18,773	19,057
Other long term liabilities	750	1,000
TOTAL LIABILITIES	71,308	68,658
Stockholders' equity (deficit):
Preferred Stock: 5,000 shares authorized; no shares issued and outstanding at March 31, 2015 and December 31, 2014, $0.001 par value	0	0
Common Stock: 45,000 shares authorized; 14,893 shares issued and outstanding at March 31, 2015, $0.001 par value; 14,824 shares issued and outstanding at December 31, 2014, $0.001 par value	15	15
Additional paid-in capital	192,705	192,112
Accumulated other comprehensive gain	1,902	1,925
Accumulated deficit	(79,715)	(79,040)
TOTAL STOCKHOLDERS' EQUITY	114,907	115,012
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 186,215	$ 183,670