Note 5 - Revenue (Tables)

9 Months Ended

Jun. 30, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30,				Nine Months Ended June 30,
	2020		2019		2020		2019
United States	$	25,090,614	$	20,243,754	$	62,765,455	$	55,861,025
All other countries		879,431		1,648,490		2,991,090		5,204,734
Total Net Sales	$	25,970,045	$	21,892,244	$	65,756,545	$	61,065,759

	Three Months Ended June 30,						Nine Months Ended June 30,
	2020			2019			2020			2019
Broadband service providers		97	%		97	%		96	%		95	%
Build-to-print customers		3	%		3	%		4	%		5	%
Total Net Sales		100	%		100	%		100	%		100	%