CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Gain (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 195,995,000	$ 5,000	$ 524,358,000		$ (328,368,000)
Beginning balance, Shares at Dec. 31, 2020		50,265,575
Issuance of common stock, net of discounts and issuance costs	1,454,000		1,454,000
Issuance of common stock, net of discounts and issuance costs, Share		114,914
Vesting of common stock from option exercises	4,000		4,000
Vesting of common stock from option exercises, Shares		1,011
Issuance of common stock from option exercises	143,000		143,000
Issuance of common stock from option exercises, Shares		55,277
Issuance of common stock pursuant to employee stock purchase plan	446,000		446,000
Issuance of common stock pursuant to employee stock purchase plan, Shares		48,792
Stock-based compensation	3,883,000		3,883,000
Other comprehensive gain (loss)	(23,000)			$ (23,000)
Net income (loss)	(1,073,000)				(1,073,000)
Ending balance at Mar. 31, 2021	200,829,000	$ 5,000	530,288,000	(23,000)	329,441,000
Ending balance, Shares at Mar. 31, 2021		50,485,569
Beginning balance at Dec. 31, 2021	169,651,000	$ 6,000	593,784,000	(7,000)	(424,132,000)
Beginning balance, Shares at Dec. 31, 2021		57,150,274
Issuance of common stock from RSU vesting		$ 87,140,000
Issuance of common stock from option exercises	1,000		1,000
Issuance of common stock from option exercises, Shares		293
Issuance of common stock pursuant to employee stock purchase plan	439,000		439,000
Issuance of common stock pursuant to employee stock purchase plan, Shares		147,871
Stock-based compensation	4,051,000		4,051,000
Other comprehensive gain (loss)	7,000			$ 7,000
Net income (loss)	92,105,000				92,105,000
Ending balance at Mar. 31, 2022	$ 266,254,000	$ 6,000	$ 598,275,000		$ (332,027,000)
Ending balance, Shares at Mar. 31, 2022		57,385,578