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9. Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Warranty liability $ 79us-gaap_DerivativeFairValueOfDerivativeLiability
Level 1  
Warranty liability   
Level 2  
Warranty liability   
Level 3  
Warranty liability $ 79us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_FairValueInputsLevel3Member