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Share-Based Payment Awards - Summary of Information about Stock Options (Detail) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2019
Jun. 30, 2018
Jun. 30, 2017
Total cash received from exercise of stock options $ 536 $ 414 $ 503 $ 99
Equity Incentive Plans [Member]        
Weighted-average grant date fair value per share $ 1.37 $ 0.93 $ 1.06 $ 1.95
Total cash received from exercise of stock options $ 219 $ 414 $ 503 $ 99
Total intrinsic value of stock options exercised $ 284 $ 84 $ 152 $ 53