Related Parties (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	May 29, 2018	Mar. 30, 2018	Mar. 31, 2018
Relative of Former Board Member [Member]
Related Party Transaction [Abstract]
Related party expense			$ 13
Broadfin Capital and Sabby Management Stock Purchase Agreements [Member] | Broadfin Capital [Member]
Related Party Transaction [Abstract]
Sale of common stock, net of offering costs		$ 1,000
Sale of common stock, net of offering costs (in shares)		925,926
Share price (in dollars per share)		$ 1.08
Broadfin Capital and Sabby Management Stock Purchase Agreements [Member] | Sabby Management LLC and Broadfin LLC [Member]
Related Party Transaction [Abstract]
Sale of common stock, net of offering costs		$ 1,000
Sale of common stock, net of offering costs (in shares)		925,926
Share price (in dollars per share)		$ 1.08
Subscription Agreement [Member] | Dr. Dolev Rafaeli [Member]
Related Party Transaction [Abstract]
Sale of common stock, net of offering costs	$ 1,000	$ 1,000
Sale of common stock, net of offering costs (in shares)	925,926	925,926
Share price (in dollars per share)	$ 1.08	$ 1.08