Inventories (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Major classes of inventories
Raw materials	$ 2,122,000	$ 2,122,000		$ 2,332,000
Work in process	796,000	796,000		55,000
Finished goods	12,208,000	12,208,000		13,957,000
Total inventories	15,126,000	15,126,000		16,344,000
Goods produced in third-party manufacturing facilities included in finished goods inventory	600,000	600,000
Equity-based compensation capitalized into inventory	$ 100,000	$ 100,000	$ 400,000