Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Details)

v3.7.0.1
Intangible Assets (Details) - USD ($)
 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Intangible Assets    
Intangible Assets, Gross $ 7,706,000 $ 8,196,000
Accumulated Amortization 7,055,000 7,255,000
Intangible Assets, Net 651,000 941,000
Amortization expense 300,000 400,000
Expected future amortization expense of intangible assets    
2018 240,000  
2019 224,000  
2020 187,000  
Intangible Assets, Net $ 651,000 $ 941,000
Manufacturing license    
Intangible Assets    
Weighted Average Amortization Period 17 years 17 years
Intangible Assets, Gross $ 3,700,000 $ 3,700,000
Accumulated Amortization 3,684,000 3,635,000
Intangible Assets, Net 16,000 65,000
Expected future amortization expense of intangible assets    
Intangible Assets, Net $ 16,000 $ 65,000
Technology    
Intangible Assets    
Weighted Average Amortization Period 10 years 10 years
Intangible Assets, Gross $ 2,240,000 $ 2,240,000
Accumulated Amortization 1,605,000 1,381,000
Intangible Assets, Net 635,000 859,000
Expected future amortization expense of intangible assets    
Intangible Assets, Net 635,000 859,000
Backlog    
Intangible Assets    
Intangible Assets, Gross   490,000
Accumulated Amortization   473,000
Intangible Assets, Net   17,000
Impairment of Intangible Assets, Finite-lived 17,000 100,000
Expected future amortization expense of intangible assets    
Intangible Assets, Net   17,000
Trade Name and Parts, Service and TA100 Customer Relationships    
Intangible Assets    
Intangible Assets, Gross 1,766,000 1,766,000
Accumulated Amortization $ 1,766,000 $ 1,766,000
Minimum | Trade Name and Parts, Service and TA100 Customer Relationships    
Intangible Assets    
Weighted Average Amortization Period 1 year 2 months 12 days 1 year 2 months 12 days
Maximum | Trade Name and Parts, Service and TA100 Customer Relationships    
Intangible Assets    
Weighted Average Amortization Period 5 years 5 years