Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities
Net income (loss)	$ 37,096	$ (42,366)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation expense	861	2,009
Depreciation and amortization	180	90
Bad debt expense	200
Net gain on disposal of assets	(57,245)
Changes in operating assets and liabilities:
Accounts and other receivables	1,618	1,342
Prepaid and other current assets	2,197	(2,338)
Accounts payable	(5,382)	(4,091)
Accrued compensation and other accrued liabilities	(3,680)	663
Operating lease liability and right-of-use asset	41	157
Deferred revenue	(230)	55
Net cash flows used in operating activities	(24,344)	(44,479)
Investing Activities
Proceeds from maturities of short-term investments	2,504	38,632
Proceeds from the sale of property and equipment	447
Proceeds from the sale of complement portfolio to Vertex	55,000
Payment of transaction costs in connection with sale of complement portfolio to Vertex	(2,576)
Purchases of property and equipment		(347)
Net cash flows provided by investing activities	55,375	38,285
Financing Activities
Issuance of common stock for public offering, net of issuance costs		49,250
Issuance of common stock from stock grants and option exercises	16	205
Net cash flow provided by financing activities	16	49,455
Net increase in cash and cash equivalents	31,047	43,261
Cash and cash equivalents at beginning of the period	44,347	30,360
Cash and cash equivalents at end of the period	$ 75,394	73,621
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Right-of-use assets obtained in exchange for operating lease liabilities		$ 1,850