Annual report pursuant to Section 13 and 15(d)

Acquisition (Details Textual)

v2.4.0.6
Acquisition (Details Textual) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 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
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2013
Selling, General and Administrative Expenses [Member]
Mar. 31, 2012
Selling, General and Administrative Expenses [Member]
Mar. 31, 2013
Energy Steel [Member]
Mar. 31, 2012
Energy Steel [Member]
Mar. 31, 2011
Energy Steel [Member]
Dec. 14, 2010
Energy Steel [Member]
Mar. 31, 2013
Energy Steel [Member]
Before Adjustment of Final Allocation of Purchase Price [Member]
Mar. 31, 2013
Energy Steel [Member]
Selling, General and Administrative Expenses [Member]
Mar. 31, 2012
Energy Steel [Member]
Selling, General and Administrative Expenses [Member]
Acquisition (Textual) [Abstract]                                        
Accounting and purchase price                                 $ 17,899      
Acquisition-related costs                               676        
Received from seller due to reduction in purchase price                             384          
Purchase agreement included a contingent earn-out, minimum                           0            
Purchase agreement included a contingent earn-out, maximum                           2,000            
Earn-out paid during period                             1,000          
Interest expense, contingent earn-out                       44 204              
Lease Term agreement                           5 years            
Additional Lease Term agreement                           5 years            
Goodwill                           6,938       6,938    
Estimated useful life of intangible assets associate with customer relationship                           15 years            
Net sales 30,905 25,633 25,902 22,533 20,250 24,329 33,595 25,012 104,973 103,186 74,235         5,808        
Selling, general and administrative expense, adjustment for earn-out                                     $ (975) $ 230