Quarterly Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 6,210	$ 6,493	$ 6,443	$ 7,605	$ 9,100	$ 8,186	$ 8,215	$ 9,401	$ 26,751	$ 34,902
Contribution margin	1,071	764	595	771	1,334	987	1,048	1,290	3,201	4,659
Contribution margin %	17.20%	11.80%	9.20%	10.10%	14.70%	12.10%	12.80%	13.70%
Income (loss) before income taxes	(259)	(852)	(1,505)	(1,144)	(626)	(1,071)	(812)	(551)	(3,760)	(3,060)
Net income (loss)	$ (267)	$ (858)	$ (1,509)	$ (1,151)	$ (629)	$ (1,075)	$ (829)	$ (558)	$ (3,785)	$ (3,091)
Earnings (loss) per diluted share	$ (0.05)	$ (0.15)	$ (0.26)	$ (0.20)	$ (0.11)	$ (0.19)	$ (0.14)	$ (0.10)
Shares used in computing diluted earnings (loss) per share	5,722	5,716	5,712	5,711	5,711	5,711	5,710	5,696