Stock Option Plans - Stock Option Activity (Details) - shares	1 Months Ended
	Mar. 31, 2016	Feb. 28, 2014
2014 Plan
Stock Option Plans
Vesting period		4 years
Maximum exercise term		10 years
Exercise price of common stock grants, percentage of stock fair value		100.00%
Shares available for future option grants	0
2016 Plan
Stock Option Plans
Vesting period	4 years
Maximum exercise term	10 years
Exercise price of common stock grants, percentage of stock fair value	100.00%
Forfeited or unexercised shares under expired stock plan subject to re-issuance under current stock plan	1,136,229