Significant Customers	12 Months Ended
Jun. 30, 2019
Significant Customers [Abstract]
Significant Customers	Note 9. Significant Customers A significant portion of the Company's business is the production of military and industrial electronic equipment for use by the U.S. and foreign governments and certain industrial customers. Sales to three domestic customers accounted for approximately 54% of total sales in fiscal year 2019. Sales to two domestic customers accounted for approximately 60% of total sales in fiscal year 2018. The related accounts receivable balance, as a percentage of the Company's total trade accounts receivable balance, was 51% represented by two customers at June 30, 2019 and 61% represented by one customer at June 30, 2018. Export sales in fiscal years 2019 and 2018 were approximately $2,638,000 and $3,112,000, respectively.

Significant Customers

12 Months Ended

Jun. 30, 2019

Note 9. Significant Customers

A significant portion of the Company's business is the production of military and industrial electronic equipment for use by the U.S. and foreign governments and certain industrial customers. Sales to three domestic customers accounted for approximately 54% of total sales in fiscal year 2019. Sales to two domestic customers accounted for approximately 60% of total sales in fiscal year 2018. The related accounts receivable balance, as a percentage of the Company's total trade accounts receivable balance, was 51% represented by two customers at June 30, 2019 and 61% represented by one customer at June 30, 2018.

Export sales in fiscal years 2019 and 2018 were approximately $2,638,000 and $3,112,000, respectively.