Stockholders' Equity and Convertible Preferred Stock (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands							1 Months Ended		12 Months Ended
	Aug. 09, 2019	Jul. 12, 2019	May 31, 2019	May 29, 2019	Mar. 19, 2018	Nov. 22, 2013	Jun. 06, 2019	Sep. 30, 2013	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of common stock issued									4,825,552	2,010,028
Stock-based compensation									$ 329	$ 320
Total gross proceeds									1,154
Net proceeds									$ 787	$ 2,700
Preferred stock issued
Options outstanding									88,950	124,381
Allocated stock based compensation									$ 8	$ 213
Restricted Stock [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of non-option shares granted										19,861
Non-option grant date fair value										$ 106
2014 Equity Incentive Plan [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of shares available for grant									64,110
Options outstanding									38,058
2012 Equity Incentive Plan [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of shares available for grant									123
2013 Equity Incentive Plan [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Vested options outstanding									24,840
Number of shares available for grant									9,835
Series D Preferred Stock [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Preferred stock issued									4,725	4,725
Preferred stock outstanding									4,725	4,725
Preferred stock liquidation preference (in dollars per share)									$ 0.0001	$ 0.0001
Preferred stock, par value (in dollars per share)									$ 0.0001	$ 0.0001
Series D-1 Convertible Preferred Stock [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Description of stock conversion terms						Convertible into ten- nineteenths of a share of Common Stock.
Preferred stock issued									834	834
Preferred stock outstanding									834	834
Preferred stock liquidation preference (in dollars per share)						$ 0.0001			$ 0.0001	$ 0.0001
Description of preferred stock voting rights						Each holder of Series D-1 Preferred Stock shall be entitled to vote on all matters submitted to the Company’s stockholders and shall be entitled to such number of votes equal to the number of shares of Common Stock such shares of Series D-1 Preferred Stock are convertible into at such time, taking into account the beneficial ownership limitations set forth in the governing Certificate of Designation.
Preferred stock, par value (in dollars per share)									$ 0.0001	$ 0.0001
Series D Preferred Stock [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Preferred stock issued									4,725	4,725
Preferred stock outstanding									4,725	4,725
Preferred stock liquidation preference (in dollars per share)									$ 0.0001	$ 0.0001
Series D-1 Preferred Stock [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Preferred stock issued									834	834
Preferred stock outstanding									834	834
Preferred stock liquidation preference (in dollars per share)									$ 0.0001	$ 0.0001
Preferred stock, par value (in dollars per share)									$ 0.0001	$ 0.0001
North South's patent portfolio in September 2013 [Member] | Series D Preferred Stock [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of shares issued								1,379,685
Description of stock conversion terms								Convertible into ten-nineteenths of a share of Common Stock.
Description of preferred stock voting rights								Each share of Series D Preferred Stock has a stated value of $0.0001 per share and is convertible into ten-nineteenths of a share of Common Stock.
IPO [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of shares issued					522,876
Shares issued price per share (in dollars per share)					$ 5.74
Net proceeds from issuance of stock					$ 3,000
Securities Purchase Agreement [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of common stock issued				221,000
Purchase price (in dollars per share)				$ 2.60
Net proceeds from sale of shares and warrants			$ 800
Common Stock [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Issuance of common stock, net of offering cost / At-the-market offering									532,070
Total gross proceeds									$ 1,200
Average selling price									$ 2.17
Net proceeds									$ 1,100
Number of shares issued									532,070
Warrant [Member] | Securities Purchase Agreement [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of common stock issued				86,692
Purchase price (in dollars per warrant)				$ 2.5999
Exercise price (in dollars per share)				$ 0.0001
Warrant [Member] | Securities Common Stock Purchase Agreement [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of share surrendered							115,269
Number of penny warrants issued							115,269
Consultant [Member] | Master Service Agreement [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Stock-based compensation									$ 300
Consultant [Member] | Warrant [Member] | Master Service Agreement [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Description of issued of warrants				The Company paid to Consultant three warrants (the “Consultant Warrants”), with each warrant immediately exercisable for 33,333 shares of common stock with a $0.01 strike price.
Consultant [Member] | Warrant [Member] | Common Stock [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Number of common stock issued		33,333
Total gross proceeds		$ 333
H.C. Wainwright & Co., LLC [Member] | Market Offering Agreement [Member]
Stockholders' Equity and Convertible Preferred Stock (Textual)
Aggregate offering price of common stock	$ 1,200
Commission rate	3.00%