Stockholders' Equity (Deficit) (Details 1) shares in Thousands	Dec. 31, 2017 shares
Schedule of common stock reserved for future issuance
Common Stock, Capital Shares Reserved for Future Issuance	4,840
Shares issuable upon the exercise of warrants [Member]
Schedule of common stock reserved for future issuance
Common Stock, Capital Shares Reserved for Future Issuance	2,112
Stock options outstanding [Member]
Schedule of common stock reserved for future issuance
Common Stock, Capital Shares Reserved for Future Issuance	2,728