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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income/(loss)	$ (706)	$ 2,937
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Depreciation	487	252
Non-cash reserve charges	2	249
Stock-based compensation	108	497
Non-cash lease expense	55	(10)
Provision for deferred income taxes	(378)	(473)
Change in operating assets and liabilities:
Accounts receivable	(1,037)	(716)
Prepaid and other assets	(182)	(819)
Accounts payable and other accrued expenses	(798)	162
Inventory	(2,863)	(1,501)
Deposits	7	54
Net cash provided by/(used in) operating activities	(5,305)	632
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(299)	(297)
Net cash used in investing activities	(299)	(297)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on finance lease obligations	(23)	(11)
Purchase of treasury stock	(75)	0
Proceeds from the issuance of common stock on stock-based compensation awards	27	221
Taxes withheld and paid on employees' equity awards	(59)
Net cash (used in) provided by financing activities	(130)	210
Net increase/(decrease) in cash	(5,734)	545
Cash at beginning of period	39,173	14,040
Cash at end of period	33,439	14,585
Supplemental disclosure of cash flow information:
Cash paid for interest	(9)	(4)
Cash paid for rent	(521)	(328)
Supplemental disclosure of non-cash investing and financing activities:
Right-of-use assets obtained in exchange for new operating lease liabilities	162	1,433
Inventory transferred to property and equipment under lease	473	187
Inventory transferred to property and equipment as demo devices	$ 67	$ 0

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Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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Amount of cash inflow from issuance of shares under share-based payment arrangement. Excludes option exercised.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Amount of noncash expense for share-based payment arrangement.

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Amount of Non-cash lease expense.

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The amount of inventory transferred to property and equipment under lease in in noncash investing or financing activities.

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Amount of inventory transferred to sales rep demos.

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Amount of non-cash reserve charges.

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Amount paid for rent.

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