Warrants - Narrative (Details) - Services received - 2008 - Common stock	12 Months Ended
	Dec. 31, 2008 $ / shares shares
Class of stock
Number of shares by warrant (in shares) | shares	90,000
Warrant exercise price (in usd per share) | $ / shares	$ 2.04
Warrant term	10 years
Warrant vesting term	4 years