Note 4 - Inventory (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31, 2018		December 31, 2017
Raw materials and component parts	$	2,313,664	$	2,637,138
Work-in-process		1,209,117		523,644
Finished products		2,201,693		1,200,204
Total Inventory		5,724,474		4,360,986
Less: Inventory reserves		226,492		457,505
Net Inventory	$	5,497,982	$	3,903,481