Note 4 - Inventory (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	June 30 , 2018		December 31, 2017
Raw materials and component parts	$	1,170,772	$	2,637,138
Work-in-process		-		523,644
Finished products		954,491		1,200,204
Total Inventory	$	2,152,263		4,360,986
Less: inventory reserves		144,767		457,505
Net Inventory	$	1,980,496	$	3,903,481