Annual report pursuant to Section 13 and 15(d)

Financial Instruments and Derivative Financial Instruments (Details Textual)

v2.4.0.6
Financial Instruments and Derivative Financial Instruments (Details Textual) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Contract
Mar. 31, 2012
Contract
Financial Instruments and Derivative Financial Instruments (Additional Textual) [Abstract]    
Letters of credit outstanding, amount $ 12,354 $ 9,920
Number of foreign exchange forward contracts 0 0
Backlog [Member] | Customer one [Member]
   
Financial Instruments and Derivative Financial Instruments (Textual) [Abstract]    
Concentration of risk percentage for backlog as of the balance sheet date 21.00% 24.00%
Backlog [Member] | Customer two [Member]
   
Financial Instruments and Derivative Financial Instruments (Textual) [Abstract]    
Concentration of risk percentage for backlog as of the balance sheet date 12.00% 16.00%