Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash Flows From Operating Activities
Net loss	$ (16,540)	$ (27,128)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of leasehold improvements and equipment	869	890
Amortization of intangibles	186	225
Amortization of right of use assets	829	511
Share-based compensation expense	5,739	6,195
Loss on disposal of leasehold improvements and equipment	7	0
Provision for doubtful trade receivables	63	46
Non-cash financing costs	67	108
Changes in operating assets and liabilities:
Trade receivables	(3,319)	(2,578)
Inventories	(1,076)	(1,918)
Implementation costs for cloud computing arrangement	(304)	(278)
Prepaid expenses and other assets	(872)	(810)
Accounts payable	(744)	978
Accrued expenses	856	348
Deferred revenue	(391)	(95)
Customer deposits and other	(5)	(116)
Operating lease liabilities	(463)	(541)
Net cash used in operating activities	(15,098)	(24,163)
Cash Flows From Investing Activities
Purchases of leasehold improvements and equipment	(334)	(409)
Net cash used in investing activities	(334)	(409)
Cash Flows From Financing Activities
Proceeds from issuance of common stock, net	7,747	26,740
Proceeds from exercise of stock options	0	9,495
Payment of debt issuance costs	(77)	(110)
Principal payments on finance leases	(16)	(31)
Net cash provided by financing activities	7,654	36,094
Net (decrease) increase in cash and cash equivalents	(7,778)	11,522
Cash and cash equivalents, including restricted cash of $0.2 million for both 2022 and 2021 - beginning of year	28,219	16,697
Cash and cash equivalents, including restricted cash of $0.2 million for both 2022 and 2021 - end of year	20,441	28,219
Supplemental Disclosures of Cash Flow Information
Cash payments for interest on finance leases	1	1
Cash payments for principal on operating lease liabilities	507	541
Supplemental Schedule of Noncash Operating Activity
Right-of-use assets and operating lease obligations incurred for entering into lease amendment	0	3,637
Supplemental Schedule of Noncash Investing Activity
Financing lease obligation incurred for computer equipment and software	$ 34	$ 0