CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES
Net loss	$ (13,071)	$ (806)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	867	193
Stock compensation expense	9,679	3,230
Amortization of debt discounts and issuance costs	0	452
Other	69	0
Change in operating assets and liabilities:
Accounts receivable	(5,275)	2,337
Prepaid expenses and other current assets	1,347	234
Inventory	223	(430)
Other assets	(95)	(62)
Accounts payable	(683)	444
Accrued compensation	(523)	(1,127)
Medicare advance payment	(2,173)	8,350
Other accrued liabilities	(306)	263
Deferred rent and other liabilities	(128)	172
Net cash (used in) provided by operating activities	(10,069)	13,250
INVESTING ACTIVITIES
Purchases of property and equipment	(1,663)	(2,256)
Asset acquisition	(33,184)	0
Proceeds from sale of property and equipment	2	0
Net cash used in investing activities	(34,845)	(2,256)
FINANCING ACTIVITIES
Proceeds from public offering of common stock, net of underwriting discounts, commissions and offering costs	0	69,530
Payment of common stock offering costs	(336)	0
Repayments on term debt	0	(833)
Proceeds from exercise of common stock options	2,345	400
Proceeds from contributions to the employee stock purchase plan	1,392	823
Net cash provided by financing activities	3,401	69,920
NET CHANGE IN CASH AND CASH EQUIVALENTS	(41,513)	80,914
Beginning of period	409,852	98,845
End of period	368,339	179,759
DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Accrued purchases of property and equipment	3	194
Property and equipment acquired with tenant improvement allowance	0	714
Common stock offering costs incurred but not paid	$ 0	$ 451