Note 5 - Revenue Recognition (Tables)

9 Months Ended

Mar. 31, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended				Nine Months Ended
	March 31				March 31
	2020		2019		2020		2019
United States	$	4,200,797	$	3,611,654	$	11,785,603	$	10,653,071
Export		588,644		1,248,593		2,577,259		5,403,242
Net Sales	$	4,789,441	$	4,860,247	$	14,362,862	$	16,056,313