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Temporary Differences in Financial Statement Carrying Amounts and Tax Bases of Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deferred tax asset    
Inventories $ 2,401 $ 1,777
Program accrual 8,277 9,098
Vacation pay accrual 772 792
Accrued bonuses 1,707 1,250
Bad debt expense 1,450 1,361
Stock compensation 1,414 1,532
Domestic NOL carryforward 609 675
Foreign NOL carryforward 2,554 1,718
Tax credits 842 807
Lease liability 6,209 6,718
Accrued expenses 570 723
Unrealized foreign exchange loss 3,220 3,847
Section 174 capitalized costs 4,600 0
Other 0 744
Deferred tax assets 34,625 31,042
Less valuation allowance (3,853) (4,262)
Deferred tax assets, net 30,772 26,780
Deferred tax liabilities    
Plant and equipment, principally due to differences in depreciation and capitalized interest 36,158 37,113
Lease assets 6,079 6,600
Prepaid expenses 1,685 1,666
Deferred revenue 777 1,014
Other 529 123
Deferred tax liabilities 45,228 46,516
Total net deferred tax liabilities $ 14,456 $ 19,736