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Note 13 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2025
Equity [Abstract] |
Schedule of Capital Reserved for Future Issuance [Table Text Block] | Common stock reserved for future issuance consists of the following as of December 31, 2025:
Stock options outstanding under 2019 Equity Incentive Plan |  |  | 499,676 |
Restricted stock units outstanding under 2019 Equity Incentive Plan |  |  | 296,285 |
Performance stock units outstanding under 2019 Equity Incentive Plan, at target |  |  | 502,022 |
Shares authorized for future issuance under 2019 Equity Incentive Plan |  |  | 4,211,864 |
Shares authorized for future issuance under 2019 Employee Stock Purchase Plan |  |  | 1,581,244 |
Total |  |  | 7,091,091 |
Share-Based Payment Arrangement, Cost by Plan [Table Text Block] | The below table summarizes the Company’s stock-based compensation expense for each period presented:
|  | Year ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | ($ in thousands) |
Stock-based compensation expense |  | $ | 21,014 |  |  | $ | 16,685 |  |  | $ | 14,913 |
Share-Based Payment Arrangement, Activity [Table Text Block] | The following table summarizes stock option transactions for the year ended December 31, 2025:
|  | Number of shares |  |  | Weighted-average exercise price |  |  | Weighted-average remaining contractual term (in years) |  |  | Aggregate intrinsic value ($ in thousands) |
Outstanding at January 1, 2025 |  |  | 588,385 |  |  | $ | 33.76 |  |  |  | 4.9 |  |  | $ | 42,273 |
Options granted |  |  | — |  |  |  | — |  |  |  |  |  |  |
Options exercised |  |  | (88,175 | ) |  |  | 42.59 |  |  |  |  |  |  |
Options cancelled |  |  | (534 | ) |  |  | 83.46 |  |  |  |  |  |  |
Outstanding at December 31, 2025 |  |  | 499,676 |  |  | $ | 32.15 |  |  |  | 3.9 |  |  | $ | 51,273 |
Vested and Exercisable at December 31, 2025 |  |  | 499,676 |  |  | $ | 32.15 |  |  |  | 3.9 |  |  | $ | 51,273 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] | The following table summarizes RSU transactions for the year ended December 31, 2025:
|  | Number of shares |  |  | Weighted-average grant date fair value |
Outstanding at January 1, 2025 |  |  | 320,411 |  |  | $ | 65.03 |
Granted |  |  | 141,575 |  |  |  | 116.77 |
Released |  |  | (157,431 | ) |  |  | 63.93 |
Forfeited |  |  | (8,270 | ) |  |  | 86.71 |
Non-vested outstanding at December 31, 2025 |  |  | 296,285 |  |  | $ | 89.73 |
Schedule of Key Valuation Input Used in Monte Carlo Simulation [Table Text Block] |
|  | 2025 Awards |
Term |  | 2.9 years |
Risk-free interest rate (1) |  |  | 4.22 | %
Volatility (2) |  |  | 45.00 | %
Weighted average fair value (3) |  | $ | 116.50 |
(1) The risk-free interest rate was based on the zero-coupon U.S. Treasury yield curve on the valuation date, with a maturity matched to the performance period. (2) Volatility is derived from historical stock prices as well as implied volatility when appropriate and available. (3) The weighted average of fair values used to record compensation expense as determined by the Monte Carlo simulation.
Schedule of Nonvested Performance-Based Units Activity [Table Text Block] | The following table summarizes PSU transactions for the year ended December 31, 2025:
|  | Number of shares |  |  | Weighted-average grant date fair value |
Outstanding at January 1, 2025 |  |  | 460,450 |  |  | $ | 40.43 |
Granted |  |  | 86,844 |  |  |  | 99.61 |
Vested |  |  | (41,400 | ) |  |  | 50.35 |
Forfeited |  |  | (3,872 | ) |  |  | 75.21 |
Non-vested outstanding at December 31, 2025 |  |  | 502,022 |  |  | $ | 49.58 |

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