The Company (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Apr. 06, 2017	Dec. 31, 2017 USD ($) Systems Party Agreement Extension Arrangement $ / shares shares	Dec. 31, 2016 USD ($) shares	Mar. 31, 2017 USD ($)
Business Acquisition [Line Items]
Intangible assets, gross		$ 15,886	$ 16,374
Reverse stock-split ratio	0.20
Cash and Cash Equivalents [Line Items]
Proceeds due from credit card transactions		$ 353	60
Revenue Recognition [Abstract]
Number of types of arrangements | Arrangement		2
Revenue reimbursements			1,050
Accounts Receivable, Net [Abstract]
Allowance for doubtful accounts		$ 172	135
Inventories [Abstract]
Reserves on inventory		234	257
Accounting for the Impairment of Goodwill [Abstract]
Goodwill impairment		0
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt			20,082
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss		(18,831)	(3,335)
Product Warranty Accrual [Roll Forward]
Accrual at beginning of year		115	226
Additions charged to warranty expense		161	196
Expiring warranties/claimed satisfied		(98)	(307)
Total		178	115
Less: current portion		(109)	(102)
Total long-term accrued warranty costs		69	13
Earnings Per Share [Abstract]
Net loss			(3,335)
Gain on the change in fair value of the warrant liability		$ (102)	(5,396)
Diluted loss			$ (8,731)
Weighted average number of common and common equivalent shares outstanding [Abstract]
Basic number of common shares outstanding (in shares) | shares		2,713,782	2,119,014
Dilutive effect of warrants (in shares) | shares			196,701
Diluted number of common and common stock equivalent shares outstanding (in shares) | shares		2,713,782	2,315,715
Advertising Costs [Abstract]
Advertising expense		$ 1,434	$ 3,339
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common stock equivalents (in shares) | shares		10,195,281	14,081,204
Distribution Rights [Member]
Business Acquisition [Line Items]
Intangible assets, gross		$ 286	$ 0
Product Technology [Member]
Business Acquisition [Line Items]
Intangible assets, gross		$ 1,500	2,000
Esthetic Education, LLC [Member]
Business Acquisition [Line Items]
Agreement period		3 years
Number of extensions allowed | Extension		2
Period of extension		1 year
Ellipse Agreement [Member]
Business Acquisition [Line Items]
Monthly license fee		$ 33
License fee for initial term		$ 1,100
Number of parties involved in transaction | Party		3
Ellipse New Agreement [Member]
Business Acquisition [Line Items]
Monthly license fee		$ 10
License fee for initial term		$ 355
Number of new agreements | Agreement		2
License agreement, number of additional years automatically extended		2 years
Ellipse New Agreement [Member] | Distribution Rights [Member]
Business Acquisition [Line Items]
Intangible assets, gross		$ 286		$ 900
Gain on contract termination		$ 40
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life		3 years
Product Warranty Liability [Line Items]
Standard warranty period		1 year
Offered warranty period		3 years
Maximum [Member]
Cash and Cash Equivalents [Line Items]
Credit card transaction settlement term		5 days
Finite-Lived Intangible Assets [Line Items]
Estimated useful life		10 years
Product Warranty Liability [Line Items]
Standard warranty period		2 years
Offered warranty period		4 years
Excimer Lasers-in-Service [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Computer Hardware and Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		3 years
Computer Hardware and Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		7 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		7 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		7 years
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability		$ 3	105
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability		0	0
Fair Value, Measurements, Recurring [Member] | Significant other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability		0	0
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability		3	$ 105
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss		$ (7,747)
Weighted average number of shares outstanding during the period (in shares) | shares		2,713,782
Basic and Diluted net loss per share (in dollars per share) | $ / shares		$ (2.85)
Series C Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss		$ (11,084)
Weighted average number of shares outstanding during the period (in shares) | shares		10,444
Basic and Diluted net loss per share (in dollars per share) | $ / shares		$ (1,061.25)
XTRAC [Member]
Business Acquisition [Line Items]
Number of systems placed in dermatologists offices | Systems		753
Common Stock Equivalents of Convertible Debentures [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common stock equivalents (in shares) | shares		6,622,821	9,231,570
Common Stock Purchase Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common stock equivalents (in shares) | shares		2,406,625	3,739,037
Common Stock Equivalents of Convertible Preferred B Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common stock equivalents (in shares) | shares		289,462	496,824
Common Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common stock equivalents (in shares) | shares		876,373	613,773
ASU 2014-09 [Member] | Plan [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in accumulated deficit		$ 195