Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accrued liabilities, current [Abstract]
Accrued distribution and partner costs	$ 919	$ 409
Accrued compensation and related expenses	166	137
Accrued professional service fees	192	257
Other	1	92
Total accrued liabilities	$ 1,278	$ 895