Condensed Statements of Cash Flows $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Cash Flows From Operating Activities:
Net loss	$ (27,867)	$ (32,272)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of debt discount and debt issuance costs	186	3,342
Non-cash interest expense from long-term debt and convertible notes		5,395
Loss on extinguishment of convertible notes		16,853
Depreciation and amortization	8,053	7,948
Non-cash lease expense	465
Gain on extinguishment of PPP loan		(3,036)
Stock-based compensation expense	5,176	5,684
Change in fair value of redeemable convertible preferred stock warrant liability		535
Change in fair value of contingent consideration liability	(4,094)	780
Change in fair value of derivative liabilities		(15,243)
Property and equipment write-downs/disposals	10
Net changes in operating assets and liabilities, net of acquired businesses:
Accounts receivable, net	501	1,621
Inventory	(3,610)	(6,600)
Prepaid expenses and other current assets	1,874	(2,461)
Accounts payable	(807)	4,951
Accrued liabilities	90	1,227
Accrued compensation	706	(30)
Operating lease liability	(606)
Net cash used in operating activities	(19,923)	(11,306)
Cash Flows From Investing Activities:
Purchase of property and equipment	(125)	(888)
Net cash used in investing activities	(125)	(888)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock	34	963
Payment of contingent consideration	(5,000)
Net cash (used in) provided by financing activities	(4,966)	963
Net decrease in cash, cash equivalents and restricted cash	(25,014)	(11,231)
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	23,401	13,935
Reconciliation of cash, cash equivalents and restricted cash to balance sheets
Cash and cash equivalents	15,112	6,128
Restricted cash	8,289	7,807
Cash, cash equivalents and restricted cash in balance sheets	23,401	13,935
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest	1,930	1,894
Supplemental Disclosure of Non-cash Items:
Forgiveness of PPA Loan		(3,036)
Vesting of early exercised stock options	91	54
Net reclassification of inventory to property and equipment for customer usage agreements	2,289	$ 1,934
Right of use asset acquired under operating lease on the adoption of ASC 842	$ 894