Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Details)

v2.4.0.6
Intangible Assets (Details) (USD $)
 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Intangible Assets      
Intangible Assets, Gross $ 8,196,000 $ 8,196,000  
Accumulated Amortization 5,883,000 5,385,000  
Intangible assets, net 2,313,000 2,811,000  
Amortization expense 500,000 800,000 1,100,000
Expected future amortization expense of intangible assets      
2014 582,000    
2015 532,000    
2016 273,000    
2017 273,000    
2018 242,000    
Thereafter 411,000    
Intangible assets, net 2,313,000 2,811,000  
Manufacturing license
      
Intangible Assets      
Weighted Average Amortization Period 17 years 17 years  
Intangible Assets, Gross 3,700,000 3,700,000  
Accumulated Amortization 3,487,000 3,437,000  
Intangible assets, net 213,000 263,000  
Expected future amortization expense of intangible assets      
Intangible assets, net 213,000 263,000  
Technology
      
Intangible Assets      
Weighted Average Amortization Period 10 years 10 years  
Intangible Assets, Gross 2,240,000 2,240,000  
Accumulated Amortization 709,000 485,000  
Intangible assets, net 1,531,000 1,755,000  
Expected future amortization expense of intangible assets      
Intangible assets, net 1,531,000 1,755,000  
Parts and service customer relationships
      
Intangible Assets      
Weighted Average Amortization Period 5 years 5 years  
Intangible Assets, Gross 1,080,000 1,080,000  
Accumulated Amortization 684,000 468,000  
Intangible assets, net 396,000 612,000  
Expected future amortization expense of intangible assets      
Intangible assets, net 396,000 612,000  
TA100 customer relationships
      
Intangible Assets      
Weighted Average Amortization Period 2 years 2 years  
Intangible Assets, Gross 617,000 617,000  
Accumulated Amortization 617,000 617,000  
Backlog
      
Intangible Assets      
Intangible Assets, Gross 490,000 490,000  
Accumulated Amortization 317,000 309,000  
Intangible assets, net 173,000 181,000  
Expected future amortization expense of intangible assets      
Intangible assets, net 173,000 181,000  
Trade name
      
Intangible Assets      
Weighted Average Amortization Period 1 year 2 months 12 days 1 year 2 months 12 days  
Intangible Assets, Gross 69,000 69,000  
Accumulated Amortization $ 69,000 $ 69,000