Statements of Operations and Comprehensive Income (Loss) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Operating expenses
General and administrative expenses	$ 58,231	$ 67,352	$ 147,396	$ 148,256
Loss from operations	(58,231)	(67,352)	(147,396)	(148,256)
Other income (expense)
Interest and dividend income, net	18,400	9,539	30,208	29,196
Change in fair value of conversion feature	38,136	(29,158)	37,200	(33,253)
Gain on distribution of investment in ClearSign	0	811,713	0	811,713
Realized gains (losses) on available-for-sale securities	25,104	660	14,118	(1,141)
Income (loss) before provision for income taxes	23,409	725,402	(65,870)	658,259
Provision for income taxes	0	8,013	800	8,013
Net income (loss)	23,409	717,389	(66,670)	650,246
Other comprehensive income
Unrealized gain (loss) on available-for-sale securities	(41,968)	11,176	(25,725)	12,317
Comprehensive gain (loss)	$ (18,559)	$ 728,565	$ (92,395)	$ 662,563
Basic earnings (loss) per common share (in dollars per share)	$ 0.00	$ 0.09	$ (0.01)	$ 0.08
Diluted earnings (loss) per common share (in dollars per share)	$ 0.00	$ 0.08	$ (0.01)	$ 0.07
Weighted average number of shares outstanding:
Basic (in shares)	8,471,558	8,158,835	8,428,907	8,117,417
Diluted (in shares)	9,649,028	9,149,988	8,428,907	9,108,570