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Short-Term Debt - Detail Short Term Debt (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Debt Disclosure [Abstract]
Interest UBS short-term credit line	$ 8,000	$ 13,000	$ 16,000	$ 24,000
Interest RBC short-term margin loan		11,000		15,000
Total interest, short-term margin loans	$ 8,000	$ 24,000	$ 16,000	$ 39,000