Convertible Subordinated Debt (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended			1 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2011 Convertible Senior Subordinated Notes [Member]	Jun. 30, 2013 Convertible Senior Subordinated Notes [Member]	Jun. 30, 2013 Supply Agreement With Pt. Alumindo [Member]
Proceeds from Issuance of Subordinated Long-term Debt						$ 12,000
Debt Instrument, Interest Rate During Period						10.00%
Debt Instrument, Maturity Date			Dec. 31, 2014			Jun. 01, 2016
Debt Instrument, Convertible, Conversion Price	$ 4.05		$ 4.05				$ 7.00
Convertible Subordinated Debt	4,000		4,000
Derivative Liability, Fair Value, Amount Not Offset Against Collateral, Total	2,829		2,829
Unrealized Gain (Loss) on Derivatives	44	195	2,167	49
Amortization of convertible note discount	141	141	283	283
Payments to Fund Long-term Loans to Related Parties			1,000					1,000
Finite-Lived Intangible Assets, Net	802		802		962			962
Debt Conversion Number Of Common Stock Per 1000 Principal Amount			247,040
Related Party Loan Monthly Installment								278
Related Party Loan Monthly Installment Upon Disagreement								556
Related Party Loan Effective Interest Rate Upon Disagreement								3.50%
Related Party Loan Interest Rate Basis Upon Disagreement			3.74%
Amortization Of Intangible Assets	$ 80		$ 160