CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows From Operating Activities:
Net loss	$ (1,857)	$ (3,969)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	2,689	2,793
Amortization of right-of-use asset	261	242
Provision (recoveries) for doubtful accounts	(26)	65
Stock-based compensation	1,563	1,243
Loss on disposal of property and equipment	73	23
Gain on forgiveness of debt	(2,028)	0
Deferred taxes	12	207
Changes in operating assets and liabilities:
Accounts receivable	(181)	1,811
Inventories	219	(475)
Prepaid expenses and other assets	(243)	98
Accounts payable	(284)	1,608
Other accrued liabilities	859	(576)
Other liabilities	(88)	(126)
Operating lease liabilities	(275)	(226)
Deferred revenues	145	(968)
Net cash provided by operating activities	839	1,750
Cash Flows From Investing Activities:
Purchase of property and equipment	(2,523)	(1,447)
Cash paid in connection with Ra Medical asset acquisition	(3,473)	0
Net cash used in investing activities	(5,996)	(1,447)
Cash Flows From Financing Activities
Proceeds from Senior Term Facility borrowings, net of fees	7,867	0
Repayment of note payable	(7,275)	0
Proceeds from (repayment of) long-term debt	(500)	2,528
Net cash provided by financing activities	92	2,528
Net (decrease) increase in cash and cash equivalents and restricted cash	(5,065)	2,831
Cash, cash equivalents and restricted cash, beginning of period	18,112	15,629
Cash, cash equivalents and restricted cash, end of period	13,047	18,460
Cash and cash equivalents	13,047	11,063
Restricted cash	0	7,397
Supplemental information of cash and non-cash transactions:
Cash paid for interest	109	157
Fair value of warrants issued in connection with debt	585	0
Assumed deferred revenue in connection with Ra Medical asset acquisition	$ 1,841	$ 0