Cash and Available for Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Cash and cash equivalents:
Cash	$ 489	$ 304
Cash equivalents
Total cash equivalents	2	1
Total cash and cash equivalents	491	305	$ 2,138	$ 2,789
Short-term investments:
Total short-term investments	63	129
Long-term investments:
Total cash, and cash equivalents, short-term and long-term investments	554	434
Collateralized Debt Obligations [Member]
Short-term investments:
Total short-term investments	0	0
Money Market Mutual Funds [Member]
Cash equivalents
Total cash equivalents	2	1
Certificates of Deposit [Member]
Short-term investments:
Total short-term investments	23	123
Commercial Paper [Member]
Short-term investments:
Total short-term investments	34	0
Other Commodities [Member]
Short-term investments:
Total short-term investments	$ 6	$ 6