Stockholders' Equity (Deficit) (Details 2) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Shares
Exercisable at March 31			736
Option [Member]
Shares
Outstanding at January 1	1,077	1,037
Granted		40
Canceled	(10)
Outstanding at March 31	1,067	1,077
Vested and expected to vest at March 31	1,062	1,077
Exercisable at March 31			736	402
Weighted Average Exercise Price Per share
Outstanding at January 1	$ 1.59	$ 1.65
Granted		0.50
Canceled	56.10
Outstanding at March 31	1.25	3.24
Vested and expected to vest at March 31	1.59	1.61
Exercisable at March 31	$ 1.59	$ 3.24	$ 1.25	$ 3.24
Weighted Average Remaining Contractual Life Term (in years)
Outstanding at March 31	4 years 9 months 3 days	5 years 8 months 19 days
Vested and expected to vest at March 31	4 years 11 months 1 day	5 years 8 months 19 days
Exercisable at March 31	4 years 7 months 6 days	5 years 3 months 11 days
Aggregate Intrinsic Value
Outstanding at January 1
Granted
Canceled
Outstanding at March 31
Vested and expected to vest at March 31
Exercisable at March 31