Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows From Operating Activities
Net loss	$ (14,137)	$ (12,947)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of leasehold improvements and equipment	413	447
Amortization of intangibles	99	121
Amortization of right of use assets	468	254
Share-based compensation expense	3,184	2,900
Loss on disposal of leasehold improvements and equipment	5	0
Provision for doubtful trade receivables	22	26
Non-cash financing costs	34	57
Changes in operating assets and liabilities:
Trade receivables	976	(3,331)
Inventories	(2,152)	(500)
Implementation costs for cloud computing arrangement	(204)	(79)
Prepaid expenses and other assets	529	171
Accounts payable	(226)	525
Accrued expenses	215	(564)
Deferred revenue	(118)	0
Customer deposits and other	16	(68)
Operating lease liabilities	(154)	(312)
Net cash used in operating activities	(11,030)	(13,300)
Cash Flows From Investing Activities
Purchases of leasehold improvements and equipment	(110)	(311)
Net cash used in investing activities	(110)	(311)
Cash Flows From Financing Activities
Proceeds from issuance of common stock, net	0	26,740
Proceeds from exercise of stock options	0	9,024
Payment of debt issuance costs	0	(47)
Principal payments on finance leases	(7)	(25)
Net cash (used in) provided by financing activities	(7)	35,692
Net (decrease) increase in cash and cash equivalents	(11,147)	22,081
Cash and cash equivalents, including restricted cash of $0.2 million for both periods - beginning of period	28,219	16,697
Cash and cash equivalents, including restricted cash of $0.2 million for both periods - end of period	17,072	38,778
Supplemental Disclosures of Cash Flow Information
Cash payments for interest on finance leases	0	1
Cash payments for principal on operating lease liabilities	204	312
Supplemental Schedule of Noncash Operating Activity
Right-of-use assets and operating lease obligations incurred for entering into lease amendment	$ 0	$ 2,209