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Income Taxes - Summary of Net Operating Loss and Research Credit Carryforwards (Detail) $ in Millions | 12 Months Ended
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Jun. 30, 2018 USD ($)
Domestic Country [Member] | Federal [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses | $ 112.2
Net operating losses subject to sections 382,383 | Yes
Domestic Country [Member] | Federal [Member] | Minimum [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses, expiration in year | 2027
Domestic Country [Member] | Federal [Member] | Maximum [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses, expiration in year | 2033
Domestic Country [Member] | Federal [Member] | Research [Member] |
Operating Loss Carryforwards [Line Items] |
Research credit | $ 4.7
Research credit subject to sections 382,383 | Yes
Domestic Country [Member] | Federal [Member] | Research [Member] | Minimum [Member] |
Operating Loss Carryforwards [Line Items] |
Research credit, expiration in year | 2025
Domestic Country [Member] | Federal [Member] | Research [Member] | Maximum [Member] |
Operating Loss Carryforwards [Line Items] |
Research credit, expiration in year | 2032
State and Local Jurisdiction [Member] | UTAH [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses | $ 209.5
Net operating losses subject to sections 382,383 | No
State and Local Jurisdiction [Member] | UTAH [Member] | Minimum [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses, expiration in year | 2016
State and Local Jurisdiction [Member] | UTAH [Member] | Maximum [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses, expiration in year | 2024
State and Local Jurisdiction [Member] | UTAH [Member] | Research [Member] |
Operating Loss Carryforwards [Line Items] |
Research credit | $ 10.6
Research credit subject to sections 382,383 | No
State and Local Jurisdiction [Member] | UTAH [Member] | Research [Member] | Minimum [Member] |
Operating Loss Carryforwards [Line Items] |
Research credit, expiration in year | 2021
State and Local Jurisdiction [Member] | UTAH [Member] | Research [Member] | Maximum [Member] |
Operating Loss Carryforwards [Line Items] |
Research credit, expiration in year | 2031
State and Local Jurisdiction [Member] | OKLAHOMA [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses | $ 14.1
Net operating losses subject to sections 382,383 | Yes
State and Local Jurisdiction [Member] | OKLAHOMA [Member] | Minimum [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses, expiration in year | 2023
State and Local Jurisdiction [Member] | OKLAHOMA [Member] | Maximum [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses, expiration in year | 2033
Foreign (various jurisdictions) [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses | $ 34.7
Net operating losses subject to sections 382,383 | No
Foreign (various jurisdictions) [Member] | Minimum [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses, expiration date ranges | Various
Foreign (various jurisdictions) [Member] | Maximum [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating losses, expiration date ranges | Various

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