Inventories (Details) (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Major classes of inventories
Raw materials	$ 1,645,000		$ 2,332,000
Work in process	3,146,000		55,000
Finished goods	10,786,000		13,957,000
Total inventories	15,577,000		16,344,000
Goods produced in third-party manufacturing facilities included in work in process and finished goods inventories	2,500,000
Equity-based compensation capitalized into inventory	$ 100,000	$ 600,000