Note 4 - Inventory (Tables)

3 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31, 2017		September 30, 2017		September 30, 2016
Raw materials and component parts	$	2,637,138	$	2,659,171	$	2,022,092
Work-in-process		523,644		370,506		438,447
Finished products		1,200,204		1,301,338		1,083,852
Total Inventory		4,360,986		4,331,015		3,544,391
Less: Inventory reserves		457,505		473,252		235,592
Net Inventory	$	3,903,481	$	3,857,763	$	3,308,799