ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ACCRUED LIABILITIES
Product performance	$ 4,058	$ 3,959
Grants	1,055	2,320
Salaries and wages	874	1,021
Professional fees	617	732
Restructuring severance and benefits	52	200
Environmental	76	105
Other	669	2,039
Total	$ 7,401	$ 10,376