CONDENSED CONSOLIDATED BALANCE SHEETS (IN THOUSANDS, EXCEPT NUMBER OF SHARES) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 306	$ 263
Provision for obsolete inventory	$ 680	$ 673
Common stock, authorized	15,000,000	15,000,000
Common stock, issued	3,673,055	3,673,055
Common stock, outstanding	3,673,055	3,673,055