Summary of significant accounting policies (Tables)

3 Months Ended

Mar. 31, 2016

Inventories are valued using the first-in, first-out method and stated at the lower of cost or market and consist of the following:

	March 31, 2016		December 31, 2015

Raw materials and supplies	$	600,044	$	362,526
Work-in process		127,130		150,369
Finished goods		197,171		313,117
Total	$	924,345	$	826,012

Schedule of Finite-Lived Intangible Assets

Definite-lived intangible assets include trademarks, developed technology and customer relationships, and are amortized over their useful lives of 10, 7 and 7 years, respectively, and consisted of the following as of March 31, 2016:

	Cost		Accumulated Amortization		Net balance at March 31, 2016

Trademarks and tradenames	$	461,000	$	(32,838)	$	428,162
Developed technology		458,000		(46,607)		411,393
Customer relationships		1,094,000		(111,695)		982,305
	$	2,013,000	$	(191,140)	$	1,821,860