Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities and Deferred Revenue (Details)

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Accrued Liabilities and Deferred Revenue (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Components of accrued liabilities            
Payroll and benefits $ 1,684   $ 1,928      
Warranty accrual 1,980 1,926 2,218 2,686 2,728 2,725
Sales tax 491   526      
Accrued professional services 759   669      
Accrued insurance premium 98   433      
Accrued support services     200      
Other 189   203      
Accrued liabilities $ 5,201   $ 6,177