Note 4 - Inventory (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 3 1 , 201 9		December 31, 201 8
Raw materials and component parts	$	1,987,221	$	2,313,664
Work-in-process		1,736,430		1,209,117
Finished products		1,893,087		2,201,693
Total inventory	$	5,616,738		5,724,474
Less: inventory reserves		281,744		226,492
Net inventory	$	5,334,994	$	5,497,982