Subsequent Events (Details Narrative) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Feb. 15, 2019	Feb. 28, 2019	Dec. 31, 2018	Dec. 31, 2017
Proceeds from exercise of stock options			$ 58	$ 610
Subsequent Event [Member]
Sale of common stock shares		10,733,334
Proceeds from public offering		$ 37,400
Proceeds from exercise of stock options		$ 900
Exercise of stock options, shares		575,000
Subsequent Event [Member] | Shared Facilities Agreement [Member]
Payment for services	$ 2,100