Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Jun. 30, 2019 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Accounts receivable, allowances | $ 7 | $ 7 |
| Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Preferred stock, shares authorized (in shares) | 50,000,000 | 50,000,000 |
| Preferred stock, shares issued (in shares) | 0 | 0 |
| Preferred stock, shares outstanding (in shares) | 0 | 0 |
| Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Common stock, shares authorized (in shares) | 600,000,000 | 600,000,000 |
| Common stock, shares issued (in shares) | 48,151,000 | 46,911,000 |
| Common stock, shares outstanding (in shares) | 48,151,000 | 46,911,000 |