CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows From Operating Activities:
Net loss	$ (1,035)	$ (1,333)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	1,038	1,204
Amortization of right-of-use assets	79	93
Provision for doubtful accounts	2	(7)
Loss on disposal of property and equipment and lasers placed in service	0	22
Stock-based compensation	430	323
Deferred taxes	88	(42)
Amortization of debt discount	0	7
Amortization of deferred financing costs	0	27
Changes in operating assets and liabilities:
Accounts receivable	1,176	(175)
Inventories	(444)	(327)
Prepaid expenses and other assets	43	142
Accounts payable	222	281
Other accrued liabilities	16	224
Other liabilities	(59)	9
Operating lease liabilities	(60)	(76)
Deferred revenues	(898)	(36)
Net cash provided by operating activities	598	336
Cash Flows From Investing Activities:
Lasers placed-in-service	(596)	(434)
Net cash used in investing activities	(596)	(434)
Net increase (decrease) in cash and cash equivalents and restricted cash	2	(98)
Cash, cash equivalents and restricted cash, beginning of period	15,629	16,487
Cash, cash equivalents and restricted cash, end of period	15,631	16,389
Cash and cash equivalents	8,150	16,389
Restricted cash	7,481	0
Supplemental information of cash and non-cash transactions:
Cash paid for interest	52	201
Lease liabilities arising from obtaining right-of-use assets	$ 0	$ 848