Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net loss	$ (2,213)	$ (29)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	281	375
Gain on disposal of fixed assets	(73)	(32)
Non-cash interest	58
Non-cash rent		3
Stock-based compensation	613	456
Provision for reserve on accounts receivable	191	(63)
Provision for excess and obsolete inventory	318	150
Changes in operating assets and liabilities:
Accounts receivable	(582)	(83)
Inventories	327	(383)
Prepaid and other assets	(78)	(349)
Accounts payable	159	(459)
Accrued liabilities	(5)	(893)
Net cash used in operating activities	(1,004)	(1,307)
Investing activities:
Purchases of property and equipment and intangible assets	(484)	(542)
Proceeds from sale of fixed assets	93	59
Net cash used in investing activities	(391)	(483)
Financing activities:
Payments on financing leases	(8)	(25)
Payments on long-term debt		(308)
Borrowings on line of credit	12,316
Repayments on line of credit	(12,329)
Proceeds from private placement, net of cash issuance costs		18,425
Net cash (used in) provided by financing activities	(21)	18,092
Net change in cash and cash equivalents and restricted cash	(1,416)	16,302
Cash and cash equivalents and restricted cash at beginning of period	18,387	2,341
Cash and cash equivalents and restricted cash at end of period	16,971	18,643
Reconciliation of cash and cash equivalents and restricted cash reported in the condensed consolidated balance sheets
Cash and cash equivalents	16,848	18,643
Restricted cash	123
Total cash and cash equivalents and restricted cash reported in the consolidated balance sheets	$ 16,971	$ 18,643