Inventories (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current:
Raw materials	$ 734	$ 1,091
Finished goods	10,139	11,474
Inventories, current	10,873	12,565
Long-term:
Raw materials	891	444
Finished goods	1,064	1,461
Inventories, long-term	1,955	1,905
Inventory, finished goods, amount under consignment	$ 1,289	$ 1,199