Related Party Transactions (Details Narrative) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Dec. 11, 2013	May 31, 2011	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Scientific research cost			$ 1	$ 1
Exercise of stock options to purchase shares amount			$ 481	$ 2,782	$ 506
Forgiveness of notes receivable from an officer for stock option exercises					$ 423	$ 423
Robert J. Greenberg [Member]
Exercise of stock options to purchase shares	200,000	100,000
Exercise of stock options to purchase shares amount	$ 100	$ 319
Exercise of stock options to purchase shares expiration date	Dec. 31, 2018	May 31, 2016
Exercise of stock options to purchase shares interest rate	1.64%	2.26%