Segment Reporting (Details Narrative) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019 USD ($) Products	Dec. 31, 2018 USD ($)
Number of operating segments | Products	1
Number of reportable segments | Products	2
Total assets	$ 12,014	$ 10,558
Prepaid Expenses and Other Current Assets [Member]
Total assets	200	200
Series A Preferred Stock [Member]
Sale of preferred stock, cash value	1,400	2,300
Renal Products Segment [Member]
Total assets	$ 1,600	$ 2,500