v2.4.0.6
Inventory (Details Textual) (USD $)
6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Inventory [Line Items]    
Increase (decrease) in inventory reserve $ 25,000  
Inventory reserve (132,000) (107,000)
Prepaid assets 2,268,000 2,485,000
Prepaid inventory [Member]
   
Inventory [Line Items]    
Prepaid assets $ 1,888,000 $ 2,158,000