CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flows From Operating Activities:
Net loss	$ (3,790)	$ (4,033)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	4,503	5,397
Amortization of right-of-use assets	318	0
Provision for doubtful accounts	43	(30)
Gain on cancellation of distributor rights agreement	0	(11)
Impairment of lasers placed-in-service	30	194
Stock-based compensation	1,195	904
Deferred taxes	(111)	(303)
Loss on disposal of property and equipment	0	407
Amortization of deferred financing costs and debt discount	174	157
Changes in operating assets and liabilities:
Accounts receivable	(1,036)	(222)
Inventories	(233)	215
Prepaid expenses and other assets	104	(383)
Accounts payable	116	(513)
Other accrued liabilities	634	1,006
Other liabilities	(210)	(60)
Operating lease liabilities	(241)	0
Deferred revenues	733	171
Net cash provided by operating activities	2,229	2,896
Cash Flows From Investing Activities:
Lasers placed-in-service	(2,676)	(1,749)
Purchases of property and equipment	(115)	(13)
Payments on distributor rights liability	0	(23)
Net cash used in investing activities	(2,791)	(1,785)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock	0	17,000
Offering costs	0	(2,336)
Repayments of long-term debt	(7,571)	(3,000)
Proceeds (payments) on notes payable	7,275	(357)
Net cash (used in) provided by financing activities	(296)	11,307
Net (decrease) increase in cash and cash equivalents and restricted cash	(858)	12,418
Cash and cash equivalents, beginning of period	16,487	4,069
Cash and cash equivalents and restricted cash, end of period	15,629	16,487
Cash and cash equivalents	8,129	16,487
Restricted cash	7,500	0
Supplemental information:
Cash paid for interest	766	1,009
Cash paid for income taxes	0	17
Lease liabilities from obtaining right-of-use assets	$ 1,632	$ 0