Business Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Segment	Jun. 30, 2017 USD ($)
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	$ 7,533	$ 8,471	$ 13,999	$ 15,568
Cost of revenues	3,499	3,173	6,793	5,906
Gross profit	$ 4,034	$ 5,298	$ 7,206	$ 9,662
Gross profit %	53.60%	62.50%	51.50%	62.10%
Allocated operating expenses [Abstract]
Engineering and product development	$ 269	$ 423	$ 607	$ 898
Selling and marketing	2,378	2,846	5,249	5,821
Unallocated operating expenses	2,333	1,720	4,136	3,321
Total operating expenses	4,980	4,989	9,992	10,040
Operating (loss) income before other income (expense), net	(946)	309	(2,786)	(378)
Interest expense, net	(328)	(1,575)	(691)	(2,921)
Change in fair value of warrant liability	(23)	128	(22)	(4)
Other income (expense), net	(18)	6	1	6
Loss before income taxes	(1,315)	(1,132)	(3,498)	(3,297)
Dermatology Recurring Procedures [Member]
Results of Operations from Business Segments [Abstract]
Revenues	5,167	5,971	9,665	11,527
Dermatology Procedures Equipment [Member]
Results of Operations from Business Segments [Abstract]
Revenues	2,366	2,500	4,334	4,041
Operating Segments [Member] | Dermatology Recurring Procedures [Member]
Results of Operations from Business Segments [Abstract]
Revenues	5,167	5,971	9,665	11,527
Cost of revenues	1,881	1,843	3,830	3,885
Gross profit	$ 3,286	$ 4,128	$ 5,835	$ 7,642
Gross profit %	63.60%	69.10%	60.40%	66.30%
Allocated operating expenses [Abstract]
Engineering and product development	$ 210	$ 340	$ 485	$ 756
Selling and marketing	2,170	2,330	4,386	5,104
Unallocated operating expenses	0	0	0	0
Total operating expenses	2,380	2,670	4,871	5,860
Operating (loss) income before other income (expense), net	906	1,458	964	1,782
Interest expense, net	0	0	0	0
Change in fair value of warrant liability	0	0	0	0
Other income (expense), net	0	0	0	0
Loss before income taxes	906	1,458	964	1,782
Operating Segments [Member] | Dermatology Procedures Equipment [Member]
Results of Operations from Business Segments [Abstract]
Revenues	2,366	2,500	4,334	4,041
Cost of revenues	1,618	1,330	2,963	2,021
Gross profit	$ 748	$ 1,170	$ 1,371	$ 2,020
Gross profit %	31.60%	46.80%	31.60%	50.00%
Allocated operating expenses [Abstract]
Engineering and product development	$ 59	$ 83	$ 122	$ 142
Selling and marketing	208	516	863	717
Unallocated operating expenses	0	0	0	0
Total operating expenses	267	599	985	859
Operating (loss) income before other income (expense), net	481	571	386	1,161
Interest expense, net	0	0	0	0
Change in fair value of warrant liability	0	0	0	0
Other income (expense), net	0	0	0	0
Loss before income taxes	$ 481	$ 571	$ 386	$ 1,161