Segment Information (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total revenue	$ 1,290	$ 769	$ 2,450	$ 1,689
Optical [Member]
Total revenue	1,090	738	2,117	1,658
Direct Dose Rx [Member]
Total revenue	$ 200	$ 31	$ 333	$ 31