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Amount of noncash expense for share-based payment arrangement.

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Description of method used to estimate fair value of award under share-based payment arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Gross number of share options (or share units) granted during the period.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Percentage of vesting of award under share-based payment arrangement.

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Number of share options (or share units) exercised during the current period.

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EQUITY - Stock options (Detail) $ / shares in Units, $ in Thousands			1 Months Ended					3 Months Ended		6 Months Ended
	Nov. 22, 2019 employee	Oct. 16, 2019	Nov. 30, 2019 $ / shares shares	Oct. 31, 2019 $ / shares shares	Sep. 30, 2018 employee $ / shares shares	Aug. 31, 2017 $ / shares shares	Jul. 31, 2017 employee shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	Nov. 01, 2019 employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation \| $								$ 130	$ 56	$ 138	$ 111
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options valuation method										Black-Scholes valuation model
Stock options granted (in shares)					400,000					340,760	400,000
Number of employees \| employee	11				102		11
Exercise price (in dollars per share) \| $ / shares					$ 8.75
Stock-based compensation \| $								$ 1,100	$ 300	$ 1,400	$ 400
Stock options \| 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		0.33%
Stock options \| 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		0.33%
Stock options \| 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		0.33%
Employee \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)			110,000				135,000
Number of employees \| employee												11
Exercise price (in dollars per share) \| $ / shares			$ 6.28
Employee \| Stock options \| 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.33%						0.33%
Employee \| Stock options \| 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.33%						0.33%
Employee \| Stock options \| 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.33%		0.33%				0.33%
Employee \| Stock options \| 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			0.33%
Employee \| Stock options \| 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			0.33%
Chief Executive Officer (CEO) \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)				225,000		19,047
Exercise price (in dollars per share) \| $ / shares				$ 7.11		$ 5.25
Exercised (in shares)								274,267
Chief Financial Officer (CFO) \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)						25,000
Exercise price (in dollars per share) \| $ / shares						$ 5.25
Chief Financial Officer (CFO) \| Stock options \| 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						0.33%
Chief Financial Officer (CFO) \| Stock options \| 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						0.33%
Chief Financial Officer (CFO) \| Stock options \| 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						0.33%