Annual report pursuant to Section 13 and 15(d)

Components of Accrued Liabilities (Detail)

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Components of Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Components of accrued liabilities    
Payroll and benefits $ 2,326 $ 1,928
Warranty accrual, current portion 1,699 2,218
Sales tax 763 526
Accrued professional services 502 669
Accrued insurance premium 751 433
Accrued support services   200
Other 226 203
Accrued liabilities $ 6,267 $ 6,177