Subsequent Event (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 24, 2017	Dec. 31, 2016	Dec. 31, 2015
Subsequent Event
Value of shares sold by the entity		$ 5,953,832
Net proceeds after deducting commissions and other transactions costs		$ 5,953,832	$ 6
Subsequent Event
Subsequent Event
Number of shares sold by the entity	215,539
Value of shares sold by the entity	$ 3,500,000
Net proceeds after deducting commissions and other transactions costs	3,400,000
Remaining reserved amount under shelf registration	$ 90,400,000