Significant Market Segments And Customers (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Significant market segments
Accounts receivable	$ 6,979,514	$ 6,355,566
Assets	$ 52,557,784	$ 58,779,640
International sales
Significant market segments
Direct sales percentage of sales	14.00%	12.00%
DaVita Healthcare Partners, Inc.
Significant market segments
Direct sales percentage of sales	46.00%	50.00%
Accounts receivable	$ 2,538,503	$ 2,406,257
Nipro Medical Corporation [Member]
Significant market segments
Direct sales percentage of sales	10.00%	7.00%
Baxter Healthcare Organization
Significant market segments
Accounts receivable	$ 2,824,051	$ 1,863,412
Baxter Healthcare Organization \| Customer concentration
Significant market segments
Direct sales percentage of sales	26.00%	27.00%

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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