Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

v2.4.0.6
Income Taxes (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Income Taxes (Textual) [Abstract]      
Valuation allowance $ 564 $ 420  
Income Taxes (Additional Textual) [Abstract]      
Deferred income taxes include the impact of state investment tax credits 202    
State investment tax credits with an unlimited carryforward period 362    
Deferred income taxes include the impact of foreign net operating losses carryforwards 603    
Percentage of tax credits claimed reduction 30.00% 40.00%  
Unrecognized tax benefit tax credits claimed 134 1,787 1,365
Additional unrecognized tax benefit   882  
Liability unrecognized tax benefits 134 905  
Interest uncertain tax positions (320) 259 87
Penalties related to uncertain tax positions 0 0 0
Maximum [Member]
     
Income Taxes (Textual) [Abstract]      
Expire date of state investment tax credits 2027    
Expire date of foreign net operating losses carryforwards 2017    
Maximum [Member] | Federal tax jurisdictions [Member]
     
Income Taxes (Textual) [Abstract]      
Federal and State tax jurisdictions for tax period 2012    
Maximum [Member] | State tax jurisdictions [Member]
     
Income Taxes (Textual) [Abstract]      
Federal and State tax jurisdictions for tax period 2012    
Maximum [Member] | International tax jurisdictions [Member]
     
Income Taxes (Textual) [Abstract]      
Federal and State tax jurisdictions for tax period 2012    
Minimum [Member]
     
Income Taxes (Textual) [Abstract]      
Expire date of state investment tax credits 2014    
Expire date of foreign net operating losses carryforwards 2014    
Minimum [Member] | Federal tax jurisdictions [Member]
     
Income Taxes (Textual) [Abstract]      
Federal and State tax jurisdictions for tax period 2011    
Minimum [Member] | State tax jurisdictions [Member]
     
Income Taxes (Textual) [Abstract]      
Federal and State tax jurisdictions for tax period 2008    
Minimum [Member] | International tax jurisdictions [Member]
     
Income Taxes (Textual) [Abstract]      
Federal and State tax jurisdictions for tax period 2010    
State investment tax credits [Member]
     
Income Taxes (Textual) [Abstract]      
Valuation allowance 372    
Foreign operating losses carryforwards [Member]
     
Income Taxes (Textual) [Abstract]      
Valuation allowance $ 48