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Reconciliation of Federal Statutory Rate to Effective Income Tax Rate (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Rate Reconciliation [Line Items] |  |  |
Income before income taxes | $ 26,151 | $ 21,436 | $ 7,248
Expected tax at statutory rate | 5,492 | 4,502 | 2,537
Adjustments due to: |  |  |
Difference between U.S. and foreign tax | 436 | 345 | (1,797)
State income and franchise tax | (179) | 91 | (307)
Business tax credits | (2,746) | (1,760) | (708)
Stock-based compensation expense | (1,877) | (1,213) | (946)
Transaction costs |  |  | 1,232
U.S. taxation of foreign earnings | 2,227 | 2,190 |
Executive compensation | 841 | 367 | 265
Other | 92 | 97 | 205
Change in U.S. federal tax rates |  |  | (12,839)
Change in U.S. state tax rates | 0 | 748 | (151)
Change in Netherlands tax rate | (193) | (388) |
Transition tax | 0 | (1,338) | 3,266
Uncertain tax provisions | 1,069 | 1,021 | 241
Change in valuation allowance | (125) | 125 | (12,164)
Return to provision adjustments | (79) | 33 | (161)
Other | (218) | (1) | 222
Income tax (benefit) provision | $ 4,740 | $ 4,819 | $ (21,105)
Expected tax at statutory rate | 21.00% | 21.00% | 35.00%
Adjustments due to: |  |  |
Difference between U.S. and foreign tax | 1.70% | 1.60% | (24.80%)
State income and franchise tax | (0.70%) | 0.40% | (4.20%)
Business tax credits | (10.50%) | (8.20%) | (9.80%)
Stock-based compensation expense | (7.20%) | (5.70%) | (13.10%)
Transaction costs | 0.00% | 0.00% | 17.00%
U.S. taxation of foreign earnings | 8.50% | 10.20% | 0.00%
Executive compensation | 3.20% | 1.70% | 3.70%
Other | 0.40% | 0.50% | 2.80%
Change in U.S. federal tax rates | 0.00% | 0.00% | (177.10%)
Change in U.S. state tax rates | 0.00% | 3.50% | (2.10%)
Change in Netherlands tax rate | (0.70%) | (1.80%) | 0.00%
Transition tax | 0.00% | (6.20%) | 45.10%
Uncertain tax provisions | 4.10% | 4.80% | 3.30%
Change in valuation allowance | (0.50%) | 0.60% | (167.80%)
Return to provision adjustments | (0.30%) | 0.20% | (2.20%)
Other | (0.80%) | (0.10%) | 3.00%
Income tax (benefit) provision | 18.10% | 22.50% | (291.20%)

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