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, 2013
Dec. 31, 2012
Dec. 31, 2011
Components of accrued liabilities      
Payroll and benefits $ 1,898 $ 2,326  
Total warranty accrual, current portion 1,096 1,699 2,218
Sales and excise tax 322 763  
Accrued professional services 912 502  
Accrued insurance premium 428 751  
Other 341 226  
Accrued liabilities $ 4,997 $ 6,267