Note 5 - Inventories (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	June 30, 2017		December 31, 2016
Raw materials	$	2,834,616	$	3,062,830
Work-in-process		225,048		159,482
Finished goods		41,893		64,227
Totals	$	3,101,557	$	3,286,539