Stockholders' Deficit (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jul. 16, 2019	Dec. 31, 2019	Dec. 31, 2018	Nov. 21, 2017	Dec. 31, 2015	Nov. 10, 2015
Common stock, authorized		100,000,000	100,000,000
Preferred stock, authorized					15,000,000	10,000,000
Preferred stock, par value (in dollars per share)						$ 0.001
Common stock, shares, issued		1,414,671	1,173,854
Common stock, shares, outstanding		1,414,671	1,173,854
Value of common stock issued		$ 3,631	$ 5,133
Net proceeds of common stock		$ 3,631	$ 5,132
Cashless exercise of vested stock options		3,450
Common stock, par value (in dollars per share)		$ 0.001	$ 0.001
Common Stock Offering Warrants Issued
Common Stock [Member]
Common stock, shares, issued		1,414,671	1,173,854
Aggregate number of stock issued		240,817
Value of common stock issued
Net proceeds of common stock		3,600
Gross proceeds		$ 1,800
Cashless exercise of vested stock options		5,274
Warrants exercised		80,511
Cashless exercise of stock options		1,113
Exercise of stock options		$ 152
Settlement of compensation (in shares)		1,929
Number of shares issued for services		7,203	11,060
Series A Preferred Stock [Member]
Preferred stock, authorized					7,515,000	2,000,000
Preferred stock, par value (in dollars per share)					$ 0.001	$ 0.001
Public Offering [Member]
Common stock, shares, issued	371
Value of common stock issued		$ 151,838
Net proceeds of common stock	$ 3,600
Common stock, par value (in dollars per share)	$ 27.00
Price per share (in dollars per share)				$ 20.00
Proceeds from public offering	$ 3,600
Number of warrant to purchase	8,334
Public Offering [Member] | Chief Executive Officer [Member]
Value of common stock issued	$ 34,815
Private Placement [Member]
Common Stock exercise price	$ 33.75