Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Cash Flows from Operating Activities:
Net loss	$ (21,260)	$ (15,406)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	657	552
Share-based compensation	4,455	4,205
Non-cash interest expense	340	324
Cost of rental units purchased by customers	92	137
Changes in certain assets and liabilities:
Accounts receivable, net	(3,685)	(1,835)
Inventory	(840)	(1,673)
Net investments in sales-type leases	102	330
Prepaid commission expense	(610)	(278)
Prepaid expenses and other assets	1,517	1,120
Accounts payable	(2,256)	(1,365)
Accrued expenses	1,451	(715)
Deferred revenue	(1,095)	(336)
Net Cash Used in Operating Activities	(21,132)	(14,940)	$ (28,000)
Cash Flows from Investing Activities:
Purchases of property and equipment and capitalized software	(2,040)	(1,108)
Net Cash Used in Investing Activities	(2,040)	(1,108)
Cash Flows from Financing Activities:
Payments of debt issuance costs	(90)
Proceeds from exercises of stock options	52	2,303
Proceeds from the issuance of common stock		80,972
Payments of common stock offering issuance costs		(401)
Net Cash (Used) Provided by Financing Activities	(38)	82,874
Net (Decrease) Increase in Cash and Cash Equivalents	(23,210)	66,826
Cash and Cash Equivalents, Beginning of Period	94,141	48,957	48,957
Cash and Cash Equivalents, End of Period	70,931	115,783	$ 94,141
Supplemental disclosure of cash flow information:
Cash paid for interest	1,638	1,638
Transfer of Inventory to PP&E	219
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property and equipment and capitalized software in accounts payable and accrued expenses	$ 308	$ 41