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STOCK BASED COMPENSATION - Option activity for company's stock incentive plans (Detail) $ / shares in Units, $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) $ / shares shares | Jun. 30, 2018 USD ($) $ / shares shares
Number of Shares |  |
Beginning balance (in shares) | shares | 137,491 |
Exercised (in shares) | shares | (36,126) |
Ending balance (in shares) | shares | 101,365 | 137,491
Number of shares, vested, ending balance (in shares) | shares | 101,365 |
Number of shares, vested and exercisable, ending balance (in shares) | shares | 101,365 |
Weighted Average Exercise Price |  |
Beginning balance (in usd per share) | $ / shares | $ 9.15 |
Exercised (in usd per share) | $ / shares | 10.55 |
Ending balance (in usd per share) | $ / shares | 8.66 | $ 9.15
Options, weighted average exercise price, vested, ending balance (in usd per share) | $ / shares | 8.66 |
Options, weighted average exercise price, vested and exercisable, ending balance (in usd per share) | $ / shares | $ 8.66 |
Options outstanding, weighted average remaining contractual term, ending balance (in years) | 3 years 1 month 13 days | 3 years 7 months 13 days
Options, remaining contractual term, vested, ending balance (in years) | 3 years 1 month 13 days |
Options, weighted average remaining contractual term, vested and exercisable, ending balance (in years) | 3 years 1 month 13 days |
Options outstanding, aggregate intrinsic value, ending balance | $ | $ 9,199 | $ 10,390
Options, aggregate intrinsic value, vested, ending balance | $ | 9,199 |
Options, aggregate intrinsic value, vested and exercisable, ending balance | $ | $ 9,199 |

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