CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (49,530)	$ (31,988)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,617	1,435
Amortization of investment discount	0	79
Equity-based compensation	2,208	6,950
Loss on disposal of property and equipment	68	283
Unrealized (gain) loss on equity investments	(90)	157
Loss on fair value adjustments	5,030	0
(Increase) decrease in assets:
Contributions to deferred compensation plan	0	(110)
Accounts receivable	74	(615)
Inventory	(30)	(416)
Prepaid expense and other	(77)	(719)
Increase (decrease) in liabilities:
Accounts payable	(451)	658
Accrued liabilities and other	125	2,288
Deferred revenue and income	(69)	(116)
Deferred compensation	223	(51)
Net cash used in operating activities	(24,188)	(25,605)
Cash flows from investing activities:
Purchases of equipment	(167)	(447)
Purchase of marketable securities	0	(27,504)
Maturities of marketable securities	9,291	18,738
Net cash provided (used) by investing activities	9,124	(9,213)
Cash flows from financing activities:
Payments on finance leases	(540)	(424)
Proceeds from exercise of options	0	7
Proceeds from issuance of common stock under employee purchase plan	0	137
Proceeds from issuance of convertible notes	10,000	0
Transaction costs related to debt and equity issuances	(3,731)	0
Net cash provided (used) by financing activities	9,729	(280)
Effect of exchange rate on cash	(288)	(219)
Decrease in cash and cash equivalents	(5,623)	(35,317)
Cash and cash equivalents, beginning of period	34,905	39,898
Cash and cash equivalents, end of period	29,282	4,581
Non-cash investing activities:
Net transfer of instruments from inventory to property and equipment	88	202
Non-cash financing activities:
Extinguishment of 2.50% Convertible Senior Notes through issuance of common stock	0	10,180
Exchange of 2.50% Convertible Senior Notes and accrued interest for 5.00% Convertible Senior Secured Notes	56,893	0
Debt premium on issuance of 5.00% Convertible Senior Secured Notes	6,023	0
Derivative liability	38,160	0
Supplemental cash flow information:
Interest paid	0	1,506
Nonrelated Party
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of debt discount and issuance costs	692	284
Loss (gain) on extinguishment of debt	6,550	(3,565)
Increase (decrease) in liabilities:
Accrued interest	900	(159)
Related Party
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of debt discount and issuance costs	1,033	0
Loss (gain) on extinguishment of debt	6,755	0
Increase (decrease) in liabilities:
Accrued interest	784	0
Cash flows from financing activities:
Proceeds from issuance of common stock to related party	4,000	0
Non-cash financing activities:
Capital contribution from the exchange of secured note and accrued interest through the issuance of common stock with related party	$ 25,363	$ 0