Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash	$ 2,309	$ 23,378
Pledged bank deposits	296,407	201,252
Bills receivable	12,254	3,968
Accounts receivable	10,475	14,248
Inventories	56,053	48,634
Prepayments to suppliers	31,402	23,476
Consumption tax refund receivable	93,674	51,334
Amounts due from related parties	295	40
Other current assets	54,395	56,320
Deferred income tax assets	1,762	2,801
Total current assets	559,026	425,451
Property, plant and equipment, net	253,033	227,603
Intangible assets, net	855	880
Land use rights	10,694	10,708
VAT recoverable	2,568	2,232
Total assets	826,176	666,874
Current Liabilities:
Short-term bank borrowings	475,614	295,146
Bills payable	148,327	102,650
Accounts payable	81,846	130,387
Advances from customers	6,117	24,405
Accrued expenses and other payables	24,895	26,833
Income tax payable		2,344
Dividends payable	2,382	2,382
Amounts due to related parties		479
Total liabilities, all current	739,181	584,626
Series B convertible preferred stock: Par value:$0.001; Authorized: 8000,000 shares issued and outstanding:5,333,340 shares, liquidation preference $20,250	16,452	16,452
Commitments and contingencies
Stockholders' equity:
Common stock: Par value: $0.001; Authorized: 100,000,000 shares Issued and outstanding: 57,464,160 shares as at June 30, 2013 and December 31, 2012	58	58
Additional paid-in capital	51,350	50,653
Statutory reserve	4,074	4,071
Accumulated other comprehensive income	9,122	7,491
Retained earnings	5,939	3,523
Total stockholders' equity	70,543	65,796
Total liabilities and stockholders' equity	$ 826,176	$ 666,874