Condensed Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows From Operating Activities:
Net loss	$ (16,538)	$ (29,047)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of debt discount and debt issuance costs	123	2,232
Non-cash interest expense from long-term debt and convertible notes		3,867
Depreciation and amortization	5,361	5,334
Non-cash lease expense	308
Gain on extinguishment of PPP loan		(3,036)
Stock-based compensation expense	3,199	4,609
Change in fair value of redeemable convertible preferred stock warrant liability		532
Change in fair value of contingent consideration liability	(4,094)	917
Change in fair value of derivative liabilities		8,140
Loss from disposal	10
Net changes in operating assets and liabilities, net of acquired businesses:
Accounts receivable, net	275	992
Inventory	(3,043)	(4,234)
Prepaid expenses and other current assets	1,000	(480)
Other non-current assets		(11)
Accounts payable	(338)	2,929
Accrued liabilities	1,065	1,340
Accrued compensation	(51)	(271)
Operating lease liability	(397)
Net cash used in operating activities	(13,120)	(6,187)
Cash Flows From Investing Activities:
Purchase of property and equipment	(123)	(481)
Net cash used in investing activities	(123)	(481)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock	21	926
Payment of contingent consideration	(5,000)
Net cash (used in) provided by financing activities	(4,979)	926
Net decrease in cash, cash equivalents and restricted cash	(18,222)	(5,742)
Cash, cash equivalents and restricted cash at the beginning of the period	48,415	25,166
Cash, cash equivalents and restricted cash at the end of the period	30,193	19,424
Reconciliation of cash, cash equivalents and restricted cash to balance sheets
Cash and cash equivalents	22,386	11,617
Restricted cash	7,807	7,807
Cash, cash equivalents and restricted cash in balance sheets	30,193	19,424
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest	1,182	929
Supplemental Disclosure of Non-cash Items:
Forgiveness of PPA Loan		(3,036)
Vesting of early exercised stock options	64	15
Purchases of property and equipment included in accounts payable	18	24
Net reclassification of inventory to property and equipment for customer usage agreements	1,797	$ 1,936
Right of use asset acquired under operating lease on the adoption of ASC 842	$ 894