Business Segments and Geographic Data (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Segment	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | Segment	3
Results of Operations from Business Segments [Abstract]
Revenues	$ 31,449	$ 30,707
Cost of revenues	13,498	12,636
Gross profit	$ 17,951	$ 18,071
Gross profit %	57.10%	58.80%
Allocated operating expenses [Abstract]
Engineering and product development	$ 1,711	$ 1,929
Selling and marketing expenses	11,249	12,102
Unallocated operating expenses	7,401	7,637
Total operating expenses	20,361	21,668
Income (loss) from operations	(2,410)	(3,597)
Interest expense, net	(4,612)	(4,900)
Change in fair value of warrant liability	102	5,396
Other income (expense), net	17	21
Loss on extinguishment of debentures	(11,799)	0
Loss before income taxes	(18,702)	(3,080)
Assets	38,631	43,193
Operating Segments [Member] | Dermatology Recurring Procedures [Member]
Results of Operations from Business Segments [Abstract]
Revenues	22,640	23,508
Cost of revenues	8,744	8,763
Gross profit	$ 13,896	$ 14,745
Gross profit %	61.40%	62.70%
Allocated operating expenses [Abstract]
Engineering and product development	$ 1,431	$ 1,288
Selling and marketing expenses	9,454	11,541
Unallocated operating expenses	0	0
Total operating expenses	10,885	12,829
Income (loss) from operations	3,011	1,916
Interest expense, net	0	0
Change in fair value of warrant liability	0	0
Other income (expense), net	0	0
Loss on extinguishment of debentures	0
Loss before income taxes	3,011	1,916
Assets	29,722	34,612
Operating Segments [Member] | Dermatology Procedures Equipment [Member]
Results of Operations from Business Segments [Abstract]
Revenues	8,792	7,065
Cost of revenues	4,529	3,506
Gross profit	$ 4,263	$ 3,559
Gross profit %	48.50%	50.40%
Allocated operating expenses [Abstract]
Engineering and product development	$ 279	$ 210
Selling and marketing expenses	1,795	375
Unallocated operating expenses	0	0
Total operating expenses	2,074	585
Income (loss) from operations	2,189	2,974
Interest expense, net	0	0
Change in fair value of warrant liability	0	0
Other income (expense), net	0	0
Loss on extinguishment of debentures	0
Loss before income taxes	2,189	2,974
Assets	4,403	3,980
Operating Segments [Member] | Dermatology Imaging [Member]
Results of Operations from Business Segments [Abstract]
Revenues	17	134
Cost of revenues	225	367
Gross profit	$ (208)	$ (233)
Gross profit %	(1223.50%)	(173.90%)
Allocated operating expenses [Abstract]
Engineering and product development	$ 1	$ 431
Selling and marketing expenses	0	186
Unallocated operating expenses	0	0
Total operating expenses	1	617
Income (loss) from operations	(209)	(850)
Interest expense, net	0	0
Change in fair value of warrant liability	0	0
Other income (expense), net	0	0
Loss on extinguishment of debentures	0
Loss before income taxes	(209)	(850)
Assets	0	265
Reportable Geographical Components [Member] | Domestic [Member]
Results of Operations from Business Segments [Abstract]
Revenues	26,178	24,486
Reportable Geographical Components [Member] | Foreign [Member]
Results of Operations from Business Segments [Abstract]
Revenues	5,271	6,221
Other Unallocated Assets [Member]
Allocated operating expenses [Abstract]
Assets	$ 4,506	$ 4,336