Investment in Available-for-Sale Securities (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Available-for-sale Securities, Cost	$ 2,624,963	$ 2,661,356
Available-for-sale Securities, Gross Unrealized Gains	10,849	25,461
Available-for-sale Securities, Gross Unrealized Losses	(39,740)	(28,627)
Available-for-sale Securities, Fair Value	2,596,072	2,658,190
U.S. federal agency securities [Member]
Available-for-sale Securities, Cost	49,608	19,592
Available-for-sale Securities, Gross Unrealized Gains	56	196
Available-for-sale Securities, Gross Unrealized Losses	(629)	0
Available-for-sale Securities, Fair Value	49,035	19,788
Municipal securities [Member]
Available-for-sale Securities, Cost	844,796	1,154,841
Available-for-sale Securities, Gross Unrealized Gains	1,873	2,882
Available-for-sale Securities, Gross Unrealized Losses	(552)	(2,090)
Available-for-sale Securities, Fair Value	846,117	1,155,633
Certificates of Deposit [Member]
Available-for-sale Securities, Cost	1,542,914	1,193,494
Available-for-sale Securities, Gross Unrealized Gains	8,482	8,734
Available-for-sale Securities, Gross Unrealized Losses	(30,014)	(16,904)
Available-for-sale Securities, Fair Value	1,521,382	1,185,324
Corporate Debt Securities [Member]
Available-for-sale Securities, Cost	187,645	285,524
Available-for-sale Securities, Gross Unrealized Gains	438	4,164
Available-for-sale Securities, Gross Unrealized Losses	(8,545)	(9,633)
Available-for-sale Securities, Fair Value	179,538	280,055
Equity securities - ClearSign common stock [Member]
Available-for-sale Securities, Cost		7,905
Available-for-sale Securities, Gross Unrealized Gains		9,485
Available-for-sale Securities, Gross Unrealized Losses		0
Available-for-sale Securities, Fair Value		$ 17,390