Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Deficiency, Amount

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Income tax reconciliation foreign withholding taxes.

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Income tax reconciliation permanent differences.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the disposition of a business not qualifying as a discontinued operation.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Income Taxes - Reconciliation of Expected to Actual Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Reconciliation of expected to actual income tax expense
Federal income tax at 21%, 21%, 32.9%, respectively									$ (2,186)	$ (4,113)	$ (6,632)
Federal income tax rate (as a percent)									21.00%	21.00%	32.90%
Changes in tax rates									$ 631	$ 0	$ 7,257
Permanent differences									101	(148)	3,356
Foreign effective tax rate differential									(197)	60	1,163
Foreign withholding taxes, foreign branch taxes, including penalties and interest									403	431	716
Tax effect of book loss on disposition of subsidiaries									69	1,271	0
Valuation allowance on deferred tax assets									1,719	2,249	(5,765)
Excess tax deficiency for share-based payments under ASU 2016-09									284	663	309
Other									54	(161)	506
Income tax expense	$ 715	$ 60	$ 48	$ 55	$ (21)	$ (249)	$ 85	$ 437	$ 878	$ 252	$ 910