Consolidated Statements of Cash Flows (Unaudited)	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Cash flows from operating activities:
Net loss	$ (24,587,000)	$ (48,063,000)	$ (39,025,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		216,000	79,000
Stock-based compensation		5,604,000	5,637,000
Amortization of debt issuance costs		179,000	29,000
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable		(20,000)	236,000
(Increase) decrease in prepaid expenses and other current assets		(732,000)	451,000
Decrease in other assets		420,000	261,000
Decrease in accounts payable and other liabilities		(5,447,000)	(14,707,000)
Net cash provided by (used in) operating activities		(47,843,000)	(47,039,000)
Cash and cash equivalents	21,450,000	21,450,000	89,887,000
Cash paid for interest		634,000	307,000
Initial recognition of right of use asset	0	0	1,704,000
Issuance of Stock and Warrants for Services or Claims		698
Adjustments to Additional Paid in Capital, Warrant Issued		700,000	0
Stock Issued During Period, Value, Treasury Stock Reissued		6,321	0
Business Exit Costs		1,500	0
Issuance of common stock under Equity Incentive Plans, value	0
Cash flows from investing activities:
Purchases of property and equipment		(76,000)	(985,000)
Purchases of investments		(40,171,000)	(24,373,000)
Maturities of investments		22,191,000	21,772,000
Net cash (used in) provided by investing activities		(18,056,000)	(3,586,000)
Cash flows from financing activities:
Proceeds from issuance of common stock		0	16,924,000
Repurchase of common stock		(864,000)	(2,675,000)
Proceeds from debt borrowings, net of fees		24,148,000	0
Net cash used in financing activities		23,284,000	14,249,000
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect		(42,615,000)	(36,376,000)
Cash and cash equivalents at beginning of period		64,065,000	126,263,000
Cash and cash equivalents at end of period	21,450,000	21,450,000	89,887,000
Supplemental disclosure of cash flow information:
Cash paid for interest		634,000	307,000
Initial recognition of right of use asset	0	$ 0	$ 1,704,000
Issuance of common stock under Equity Incentive Plans, value	$ 0