CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 8,209	$ 7,287
Adjustments to reconcile net income to net cash (used in)/provided by operating activities:
Depreciation	1,689	1,042
Non-cash recoveries	(83)	(296)
Stock-based compensation	1,042	1,806
Non-cash lease expense	905	27
Provision for deferred income taxes	190	(473)
Change in operating assets and liabilities:
Accounts receivable	(10,397)	(3,532)
Prepaid and other assets	276	(745)
Accounts payable and other accrued expenses	(284)	1,625
Inventory	(1,898)	(4,274)
Deposits	(238)	47
Net cash (used in)/ provided by operating activities	(589)	2,514
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(420)	(759)
Net cash (used in) investing activities	(420)	(759)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on finance lease obligations	(73)	(42)
Purchase of treasury stock	(2,667)	0
Proceeds from issuance of common stock under equity offering	0	25,240
Proceeds from the issuance of common stock on stock-based awards	127	236
Taxes withheld and paid on employees' equity awards	(183)	0
Net cash (used in)/provided by financing activities	(2,796)	25,434
Net (decrease)/ increase in cash	(3,805)	27,189
Cash at beginning of period	39,173	14,040
Cash at end of period	35,368	41,229
Supplemental disclosure of cash flow information:
Cash paid for interest	(72)	(14)
Cash paid for rent	(1,510)	(1,182)
Cash paid for income taxes	(1,019)	(750)
Supplemental disclosure of non-cash investing and financing activities:
Right-of-use assets obtained in exchange for new operating lease liabilities	13,240	1,433
Right-of-use assets obtained in exchange for new finance lease liabilities	175	72
Inventory transferred to property and equipment under lease	1,254	641
Inventory transferred to property and equipment as demo devices	125	377
Capital expenditures not yet paid	$ 56	$ 0