Annual report pursuant to Section 13 and 15(d)

Segment Information (Details Textual)

v2.4.0.6
Segment Information (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2013
Segment
Mar. 31, 2012
Customer
Mar. 31, 2011
Customer
Segment Information (Textual) [Abstract]                      
Net sales $ 30,905 $ 25,633 $ 25,902 $ 22,533 $ 20,250 $ 24,329 $ 33,595 $ 25,012 $ 104,973 $ 103,186 $ 74,235
Segment Information (Additional Textual) [Abstract]                      
Sale to customer                   1 1
Percentage of total sales to a single customer                   14.00% 14.00%
Number of reportable operating segments                 1    
Sudan [Member]
                     
Segment Information (Textual) [Abstract]                      
Net sales                 0    
Iran [Member]
                     
Segment Information (Textual) [Abstract]                      
Net sales                 0    
Cuba [Member]
                     
Segment Information (Textual) [Abstract]                      
Net sales                 0    
North Korea [Member]
                     
Segment Information (Textual) [Abstract]                      
Net sales                 0    
Syria [Member]
                     
Segment Information (Textual) [Abstract]                      
Net sales                 $ 0