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Income Taxes - Tax Effects of Temporary Differences that gave Rise to Significant Portions of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Jan. 31, 2022
Jan. 31, 2021
Deferred Tax Assets:    
Inventory $ 2,159 $ 2,700
Honeywell Royalty Liability 2,655 2,590
State R&D Credits 1,925 1,546
Share-Based Compensation 593 600
Bad Debt 213 245
Warranty Reserve 198 176
Compensation Accrual 322 159
Net Operating Loss 152 154
ASU 842 Adjustment—Lease Liability 93 125
Unrecognized State Tax Benefits 64 101
Foreign Tax Credit 154 83
Deferred Service Contract Revenue 61 68
Other 224 308
Deferred Tax Assets, Total 8,813 8,855
Deferred Tax Liabilities:    
Accumulated Tax Depreciation in Excess of Book Depreciation 455 752
Intangibles 767 399
ASU 842 Adjustment – Lease Liability 90 119
Other 318 307
Deferred Tax Liabilities, Total 1,630 1,577
Subtotal 7,183 7,278
Valuation Allowance (1,778) (1,721)
Net Deferred Tax Assets 5,405 5,557
Deferred taxes are reflected in the consolidated balance sheet as follows:    
Deferred Tax Assets 5,651 5,941
Deferred Tax Liabilities (246) (384)
Total Net Deferred Tax Assets $ 5,405 $ 5,557