Significant Market Segments And Customers (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Significant market segments
Accounts receivable	$ 4,202,725	$ 6,979,514
Sales | International sales
Significant market segments
Direct sales percentage of sales	11.00%	14.00%
Sales | DaVita | Customer concentration
Significant market segments
Direct sales percentage of sales	49.00%	46.00%
Sales | Baxter | Customer concentration
Significant market segments
Direct sales percentage of sales	27.00%	26.00%
Sales | Nipro Medical Corporation
Significant market segments
Direct sales percentage of sales	9.00%	10.00%
Accounts receivable | DaVita
Significant market segments
Accounts receivable	$ 1,166,603	$ 2,538,503
Accounts receivable | Baxter
Significant market segments
Accounts receivable	$ 2,015,438	$ 2,824,051