Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities
Net income (loss)	$ (66,670)	$ 650,246
Adjustments to reconcile net income (loss) to net cash used in operating activities
Change in fair value of conversion feature	(37,200)	33,253
Stock-based compensation	28,125	31,250
Realized (gains) losses on available-for-sale securities	(14,118)	1,141
Gain on distribution of investment in ClearSign	0	(811,713)
Changes in operating assets and liabilities
Other current assets	17,353	3,597
Accounts payable	18,000	21,683
Income taxes payable	(682)	7,213
Net cash used in operating activities	(55,192)	(63,330)
Cash flows from investing activities
Purchases of available-for-sale securities	(982,246)	(1,112,656)
Proceeds received from sales of available-for-sale securities	240,633	0
Proceeds received from maturities of available-for-sale securities	792,124	996,000
Net cash provided by (used in) investing activities	50,511	116,656
Net decrease in cash and cash equivalents	(4,681)	(179,986)
Cash and cash equivalents at beginning of period	113,991	422,984
Cash and cash equivalents at end of period	109,310	242,998
Supplemental cash flow disclosure:
Income taxes paid	800	800
Supplemental non-cash disclosure
Unrealized gain (loss) on available-for-sale securities	(25,725)	12,317
Dividend of investment in ClearSign common stock	$ 0	$ 1,803,808