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Inventories
3 Months Ended
Mar. 31, 2012
Inventories [Abstract]  
Inventories
8.
Inventories

Inventories are carried at the lower of cost or market, determined on the first-in, first-out (FIFO) method.

Inventories consisted of the following:

 
 
March 31,
 
 
December 31,
 
 
 
2012
 
 
2011
 
 
 
 
 
 
 
 
Raw materials
 
$
1,518,000
 
 
$
1,503,000
 
Work in process
 
 
838,000
 
 
 
790,000
 
Finished goods
 
 
1,018,000
 
 
 
1,025,000
 
 
 
$
3,374,000
 
 
$
3,318,000