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Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Mar. 31, 2019
USD ($)
ft²
shares
Mar. 31, 2018
shares
Summary of Significant Accounting Policies (Textual)        
Total value of the contract   $ 4,700    
Gain on sale or disposal of equipment and consumable assets   562    
Total net book value   626    
Government contract remaining payment less than amount     $ 200  
Options exercisable | shares     34,000 31,781
Repurchase of common stock $ 3,000      
Stock repurchase plan expire date Nov. 19, 2021      
Accrued warranty reserve   $ 8 $ 7  
Malaysia [Member]        
Summary of Significant Accounting Policies (Textual)        
Area of land | ft²     65,000