Segment Reporting - Schedule of Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Total net revenues	$ 5,687	$ 3,809
Gross margin	3,203	2,292
Research and development expenses	1,539	1,002
Depreciation and amortization expense	163	218
Selling, general and administrative expenses	4,517	3,298
Total operating expenses	(6,219)	(4,518)
Loss from operations	(3,016)	(2,226)
Water Filtration [Member]
Total net revenues	5,687	3,809
Gross margin	3,203	2,292
Research and development expenses	808	970
Depreciation and amortization expense	163	218
Selling, general and administrative expenses	4,340	3,286
Total operating expenses	(5,311)	(4,474)
Loss from operations	(2,108)	(2,182)
Renal Products [Member]
Total net revenues
Gross margin
Research and development expenses	731	32
Depreciation and amortization expense
Selling, general and administrative expenses	177	12
Total operating expenses	(908)	(44)
Loss from operations	$ (908)	$ (44)