Inventories (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Major classes of inventories
Raw materials	$ 1,803,000	$ 1,803,000	$ 1,892,000
Work in process	2,171,000	2,171,000	3,696,000
Finished goods	9,606,000	9,606,000	9,618,000
Total inventories	13,580,000	13,580,000	15,206,000
Inventory write-off		600,000
Shelf life of Feraheme		4 years
Inventory reserve recognized as restructuring cost	$ 600,000	$ 600,000