8. Subordinated Convertible Debentures Payable (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Subordinated convertible debentures payable	$ 9,059,000	$ 9,059,000
6 ½%, due June 1991
Subordinated convertible debentures payable	1,034,000	1,034,000
6%, due May 1992
Subordinated convertible debentures payable	$ 8,025,000	$ 8,025,000