EQUITY INCENTIVE PLANS​ - Stock-Based Compensation Expense Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Stock-based Compensation [Line Items]
Stock-based compensation expense	$ 10,769	$ 3,199	$ 18,385	$ 6,111
Selling, general and administrative
Stock-based Compensation [Line Items]
Stock-based compensation expense	8,460	2,303	14,106	4,391
Research and development
Stock-based Compensation [Line Items]
Stock-based compensation expense	$ 2,309	$ 896	$ 4,279	$ 1,720