CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash Flows From Operating Activities:
Net loss	$ (4,412)	$ (3,790)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	3,585	4,503
Amortization of right-of-use assets	326	318
Provision for doubtful accounts	90	43
Impairment of lasers placed-in-service	24	30
Stock-based compensation	1,633	1,195
Deferred taxes	254	(111)
Amortization of deferred financing costs and debt discount	0	174
Changes in operating assets and liabilities:
Accounts receivable	1,352	(1,036)
Inventories	(417)	(233)
Prepaid expenses and other assets	247	104
Accounts payable	884	116
Other accrued liabilities	(444)	634
Other liabilities	(144)	(210)
Operating lease liabilities	(312)	(241)
Deferred revenues	(570)	733
Net cash provided by operating activities	2,096	2,229
Cash Flows From Investing Activities:
Lasers placed-in-service	(2,133)	(2,676)
Purchases of property and equipment	(26)	(115)
Net cash used in investing activities	(2,159)	(2,791)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	18	0
Repayments of long-term debt	0	(7,571)
Proceeds on notes payable	2,528	7,275
Net cash provided by (used in) financing activities	2,546	(296)
Net increase (decrease) in cash and cash equivalents and restricted cash	2,483	(858)
Cash and cash equivalents and restricted cash, beginning of period	15,629	16,487
Cash and cash equivalents and restricted cash, end of period	18,112	15,629
Cash and cash equivalents	10,604	8,129
Restricted cash	7,508	7,500
Supplemental information:
Cash paid for interest	211	766
Cash paid for income taxes	0	0
Lease liabilities from obtaining right of use assets	$ 0	$ 1,632