Business Segments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Segment	Sep. 30, 2017 USD ($)
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments [Abstract]
Number of operating segments | Segment			2
Results of Operations from Business Segments [Abstract]
Revenues	$ 7,892	$ 7,285	$ 21,892	$ 22,852
Cost of revenues	3,049	3,276	9,842	9,182
Gross profit	$ 4,843	$ 4,009	$ 12,050	$ 13,670
Gross profit %	61.40%	55.00%	55.00%	59.80%
Allocated operating expenses [Abstract]
Engineering and product development	$ 224	$ 411	$ 831	$ 1,309
Selling and marketing	2,487	2,492	7,737	8,312
Unallocated operating expenses	2,184	1,678	6,319	4,999
Total operating expenses	4,895	4,581	14,887	14,620
Operating loss before other expense, net	(52)	(572)	(2,837)	(950)
Interest expense, net	(239)	(1,343)	(930)	(4,264)
Change in fair value of warranty liability	(79)	81	(101)	77
Loss on extinguishment of debentures	0	(11,799)	0	(11,799)
Other income (expense), net			0	6
Loss before income taxes	(370)	(13,633)	(3,868)	(16,930)
Dermatology Recurring Procedures [Member]
Results of Operations from Business Segments [Abstract]
Revenues	5,556	5,525	15,221	17,051
Dermatology Procedures Equipment [Member]
Results of Operations from Business Segments [Abstract]
Revenues	2,366	1,760	6,671	5,801
Operating Segments [Member] | Dermatology Recurring Procedures [Member]
Results of Operations from Business Segments [Abstract]
Revenues	5,556	5,525	15,221	17,051
Cost of revenues	1,757	2,084	5,587	5,969
Gross profit	$ 3,799	$ 3,441	$ 9,634	$ 11,082
Gross profit %	68.40%	62.30%	63.30%	65.00%
Allocated operating expenses [Abstract]
Engineering and product development	$ 178	$ 348	$ 663	$ 1,104
Selling and marketing	2,276	2,043	6,663	7,145
Unallocated operating expenses	0	0	0	0
Total operating expenses	2,454	2,391	7,326	8,249
Operating loss before other expense, net	1,345	1,050	2,308	2,833
Interest expense, net	0	0	0	0
Change in fair value of warranty liability	0	0	0	0
Loss on extinguishment of debentures		0		0
Other income (expense), net				0
Loss before income taxes	1,345	1,050	2,308	2,833
Operating Segments [Member] | Dermatology Procedures Equipment [Member]
Results of Operations from Business Segments [Abstract]
Revenues	2,336	1,751	6,671	5,784
Cost of revenues	1,292	967	4,255	2,988
Gross profit	$ 1,044	$ 784	$ 2,416	$ 2,796
Gross profit %	44.70%	44.80%	36.20%	48.30%
Allocated operating expenses [Abstract]
Engineering and product development	$ 46	$ 63	$ 168	$ 204
Selling and marketing	211	449	1,074	1,167
Unallocated operating expenses	0	0	0	0
Total operating expenses	257	512	1,242	1,371
Operating loss before other expense, net	787	272	1,174	1,425
Interest expense, net	0	0	0	0
Change in fair value of warranty liability	0	0	0	0
Loss on extinguishment of debentures		0		0
Other income (expense), net				0
Loss before income taxes	$ 787	272	$ 1,174	1,425
Operating Segments [Member] | Dermatology Imaging [Member]
Results of Operations from Business Segments [Abstract]
Revenues		9		17
Cost of revenues		225		225
Gross profit		$ (216)		$ (208)
Gross profit %		(2400.00%)		(1223.50%)
Allocated operating expenses [Abstract]
Engineering and product development		$ 0		$ 1
Selling and marketing		0		0
Unallocated operating expenses		0		0
Total operating expenses		0		1
Operating loss before other expense, net		(216)		(209)
Interest expense, net		0		0
Change in fair value of warranty liability		0		0
Loss on extinguishment of debentures		0		0
Other income (expense), net				0
Loss before income taxes		$ (216)		$ (209)