Annual report pursuant to Section 13 and 15(d)

The Company and Its Accounting Policies (Details Textual)

v2.4.0.6
The Company and Its Accounting Policies (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Hour
Mar. 31, 2012
Mar. 31, 2011
The Company and Its Accounting Policies (Additional Textual) [Abstract]      
Company recognizes planned manufacturing process 28 days    
Direct labor hours worked on contracts 575    
Substantial completion of manufacturing process 95.00%    
Investment maturity date range end Jul. 11, 2013    
Minimum level of likelihood 50.00%    
Research and development costs $ 3,579 $ 3,197 $ 2,576
Antidilutive securities excluded from computation of earnings per share 14 14 17
Interest paid 59 100 5
Income taxes paid 4,064 8,111 2,051
Pension and other postretirement benefit adjustments, net of tax (92) 3,223 707
Issuance of treasury stock 297 330 163
Capital expenditures 142 13 9
Capital leases $ 11 $ 205 $ 23
Backlog [Member]
     
The Company and Its Accounting Policies (Textual) [Abstract]      
Estimated useful lives 6 months    
Customer relationships [Member]
     
The Company and Its Accounting Policies (Textual) [Abstract]      
Estimated useful lives 15 years    
Office equipment [Member] | Maximum [Member]
     
The Company and Its Accounting Policies (Textual) [Abstract]      
Estimated useful lives range 8 years    
Office equipment [Member] | Minimum [Member]
     
The Company and Its Accounting Policies (Textual) [Abstract]      
Estimated useful lives range 5 years    
Manufacturing equipment [Member] | Maximum [Member]
     
The Company and Its Accounting Policies (Textual) [Abstract]      
Estimated useful lives range 25 years    
Manufacturing equipment [Member] | Minimum [Member]
     
The Company and Its Accounting Policies (Textual) [Abstract]      
Estimated useful lives range 8 years    
Building and improvements [Member]
     
The Company and Its Accounting Policies (Textual) [Abstract]      
Estimated useful lives range 40 years