8. Investment in and advances to affiliates (Details 1) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 SBS Financial Products Company, LLC [Member]	Jun. 30, 2012 SBS Financial Products Company, LLC [Member]
Total assets			$ 143,444,000
Total liabilities			142,751,000
Total members' capital			693,000
Total revenues	14,000	30,000	(208,000)	51,000
Net income (loss)	$ (85,000)	$ (23,000)	$ (360,000)	$ (48,000)