Income Taxes (Details 2) (USD $)	12 Months Ended		84 Months Ended
	Dec. 31, 2013	Dec. 31, 2007	Dec. 31, 2013 item
Income Taxes
Unrealized excess tax benefits related to stock based compensation costs	$ 800,000
Ownership change
Number of ownership changes undergone			0
Amount of net operating losses incurred		4,500,000
Amount of credits incurred		100,000
Minimum
Ownership change
Number of ownership changes undergone		1
Maximum
Ownership change
Amount of net operating losses incurred		4,500,000
Amount of credits incurred		100,000
Research and development
Carryforwards of tax credits
Credits	2,966,000		2,966,000
Federal
Carryforwards of net operating losses
Net operating losses	$ 85,955,000		$ 85,955,000