Business Segments and Geographic Data (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018 USD ($) Segment	Mar. 31, 2017 USD ($)	Dec. 31, 2017
Segment Reporting Information [Line Items]
Number of operating segments | Segment	3
Results of Operations from Business Segments [Abstract]
Revenues	$ 6,466	$ 7,097
Cost of revenues	3,295	2,733
Gross profit	$ 3,171	$ 4,364
Gross profit %	49.00%	61.50%
Allocated operating expenses [Abstract]
Engineering and product development	$ 338	$ 475
Selling and marketing expenses	2,871	2,975
Unallocated operating expenses	1,803	1,601
Total operating expenses	5,012	5,051
Operating loss before other income (expense), net	(1,841)	(687)
Interest expense, net	(363)	(1,346)
Other income (expense), net	21	(132)
Income (loss) before income taxes	(2,183)	(2,165)
Domestic [Member]
Results of Operations from Business Segments [Abstract]
Revenues	5,155
Foreign [Member]
Results of Operations from Business Segments [Abstract]
Revenues	$ 1,311
Long Lived Assets [Member] | Geographic Concentration Risk [Member] | Domestic [Member]
Allocated operating expenses [Abstract]
Concentration risk percentage	100.00%		100.00%
Dermatology Recurring Procedures [Member]
Results of Operations from Business Segments [Abstract]
Revenues	$ 4,498
Dermatology Recurring Procedures [Member] | Domestic [Member]
Results of Operations from Business Segments [Abstract]
Revenues	4,498
Dermatology Recurring Procedures [Member] | Foreign [Member]
Results of Operations from Business Segments [Abstract]
Revenues	0
Dermatology Procedures Equipment [Member]
Results of Operations from Business Segments [Abstract]
Revenues	1,968
Dermatology Procedures Equipment [Member] | Domestic [Member]
Results of Operations from Business Segments [Abstract]
Revenues	657
Dermatology Procedures Equipment [Member] | Foreign [Member]
Results of Operations from Business Segments [Abstract]
Revenues	1,311
Operating Segments [Member] | Dermatology Recurring Procedures [Member]
Results of Operations from Business Segments [Abstract]
Revenues	4,498	5,556
Cost of revenues	1,949	2,042
Gross profit	$ 2,549	$ 3,514
Gross profit %	56.70%	63.20%
Allocated operating expenses [Abstract]
Engineering and product development	$ 274	$ 416
Selling and marketing expenses	2,216	2,773
Unallocated operating expenses	0	0
Total operating expenses	2,490	3,189
Operating loss before other income (expense), net	59	325
Interest expense, net	0	0
Other income (expense), net	0	0
Income (loss) before income taxes	59	325
Operating Segments [Member] | Dermatology Procedures Equipment [Member]
Results of Operations from Business Segments [Abstract]
Revenues	1,968	1,537
Cost of revenues	1,346	691
Gross profit	$ 622	$ 846
Gross profit %	31.60%	55.00%
Allocated operating expenses [Abstract]
Engineering and product development	$ 64	$ 58
Selling and marketing expenses	655	202
Unallocated operating expenses	0	0
Total operating expenses	719	260
Operating loss before other income (expense), net	(97)	586
Interest expense, net	0	0
Other income (expense), net	0	0
Income (loss) before income taxes	(97)	586
Operating Segments [Member] | Dermatology Imaging [Member]
Results of Operations from Business Segments [Abstract]
Revenues		4
Cost of revenues		0
Gross profit		$ 4
Gross profit %		100.00%
Allocated operating expenses [Abstract]
Engineering and product development		$ 1
Selling and marketing expenses		0
Unallocated operating expenses		0
Total operating expenses		1
Operating loss before other income (expense), net		3
Interest expense, net		0
Other income (expense), net		0
Income (loss) before income taxes		3
Reportable Geographical Components [Member] | Domestic [Member]
Results of Operations from Business Segments [Abstract]
Revenues	5,155	6,014
Reportable Geographical Components [Member] | Foreign [Member]
Results of Operations from Business Segments [Abstract]
Revenues	$ 1,311	$ 1,083