Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Additional Information (Detail)

v3.19.2
Fair Value Measurements - Additional Information (Detail)
Jun. 30, 2019
USD ($)
Fair Value Disclosures [Abstract]  
Fair value, assets, level 1 to level 2 transfers, amount $ 0
Fair value, assets, level 2 to level 1 transfers, amount 0
Fair value, assets, level 1 to level 3 transfers, amount 0
Fair value, assets, level 3 to level 1 transfers, amount 0
Fair value, assets, level 2 to level 3 transfers, amount 0
Fair value, assets, level 3 to level 2 transfers, amount $ 0