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Temporary Differences in Financial Statement Carrying Amounts and Tax Bases of Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred tax asset    
Inventories $ 1,777 $ 1,416
Program accrual 9,098 7,306
Vacation pay accrual 792 815
Accrued bonuses 1,250 589
Bad debt expense 1,361 952
Stock compensation 1,532 2,079
Domestic NOL carryforward 675 708
Foreign NOL carryforward 1,718 1,434
Tax credits 807 931
Lease liability 6,718 3,378
Accrued expenses 723 347
Unrealized foreign exchange loss 3,847 2,798
Other 744 735
Deferred tax asset 31,042 23,488
Less valuation allowance (4,262) 0
Deferred tax asset, net 26,780 23,488
Deferred tax liability    
Plant and equipment, principally due to differences in depreciation and capitalized interest 37,113 36,878
Lease assets 6,600 3,332
Prepaid expenses 1,666 1,508
Deferred revenue 1,014 874
Other 123 1,692
Deferred tax liability 46,516 44,284
Total net deferred tax liability $ 19,736 $ 20,796