ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010
ACCRUED LIABILITIES
Accrued payroll and benefits	$ 2,613	$ 2,762
Accrued property taxes	526	250
Income taxes payable	384	386
Accrued professional fees	632	433
Accrued warranty liability	762	983	897	1,071
Accrued other	598	935
Total accrued liabilities	$ 5,515	$ 5,749