CONDENSED CONSOLIDATED BALANCE SHEETS (IN THOUSANDS, EXCEPT NUMBER OF SHARES) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 320	$ 314
Provision for obsolete inventory	$ 688	$ 678
Common stock, no par value	$ 0	$ 0
Common stock, authorized	15,000,000	15,000,000
Common stock, issued	3,710,555	3,673,055
Common stock, outstanding	3,710,555	3,673,055