Patents, net (Details) - USD ($) |
6 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Jun. 30, 2019 |
|
| Purchased Patent Rights | $ 5,389,000 | $ 5,344,000 |
| Patent costs - net | 3,201,000 | 3,342,000 |
| Patents [Member] | ||
| Purchased Patent Rights | $ 4,082,000 | 4,082,000 |
| Useful life | 14 years | |
| Accumulated amortization | $ (1,917,000) | (1,765,000) |
| Patents Two [Member] | ||
| Purchased Patent Rights | $ 144,000 | 144,000 |
| Useful life | 12 years | |
| Patents Three [Member] | ||
| Purchased Patent Rights | $ 1,163,000 | 1,118,000 |
| Useful life | 17 years | |
| Accumulated amortization | $ (271,000) | $ (237,000) |