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Note 5 - Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 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 June 30, 2025:

Stock options outstanding under 2019 Equity Incentive Plan			510,444
Restricted stock units outstanding under 2019 Equity Incentive Plan			314,227
Performance stock units outstanding under 2019 Equity Incentive Plan, at target			503,451
Shares authorized for future issuance under 2019 Equity Incentive Plan			4,225,816
Shares authorized for future issuance under 2019 Employee Stock Purchase Plan			1,587,360
Total			7,141,298

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:

		Three Months Ended June 30,								Six Months Ended June 30,
		2025				2024				2025				2024
		(in thousands)								(in thousands)
Stock-Based Compensation		$	5,347			$	3,968			$	10,092			$	7,789

Share-Based Payment Arrangement, Activity [Table Text Block]

The following table summarizes stock option transactions for the six months ended June 30, 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			(77,599	)			42.09
Options cancelled			(342	)			94.38
Outstanding at June 30, 2025			510,444			$	32.45				4.4			$	53,407
Vested and Exercisable at June 30, 2025			510,024			$	32.41				4.4			$	53,382

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

The following table summarizes RSU transactions for the six months ended June 30, 2025:

		Number of shares				Weighted-average grant date fair value
Outstanding at January 1, 2025			320,411			$	65.03
Granted			120,775				115.43
Released			(122,487	)			60.64
Forfeited			(4,472	)			82.82
Non-vested outstanding at June 30, 2025			314,227			$	85.87

Schedule of Nonvested Performance-Based Units Activity [Table Text Block]

The following table summarizes PSU transactions for the six months ended June 30, 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			(2,443	)			64.97
Non-vested outstanding at June 30, 2025			503,451			$	49.70

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