Ekso Bionics Holdings, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Capitalization and Equity Structure - Narrative (Details)

Capitalization and Equity Structure - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended					12 Months Ended
	Jun. 08, 2020	Feb. 28, 2021	Oct. 31, 2020	Jun. 30, 2020	Dec. 31, 2019	May 30, 2019	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	May 31, 2019
Class of Warrant or Right [Line Items]
Common stock, shares authorized (in shares)							141,429,000	141,429,000
Preferred stock, shares authorized (in shares)							10,000,000	10,000,000
Common stock, shares issued (in shares)							13,203,000	12,693,000
Common stock, shares, outstanding (in shares)							13,203,000	12,693,000
Preferred stock, shares issued (in shares)							0	0
Preferred stock, shares outstanding (in shares)							0	0
Proceeds from issuance of common stock and warrants, net							$ 0	$ 37,295
Warrants issued (in shares)							0
Exercise price (in dollars per share)							$ 8.06
Aggregate proceeds							$ 0	$ 1,417
Warrants expired (in shares)							0	(358,000)
Exercise of warrants (in shares)							0	300,000
Warrants exercised (in shares)							0
Warrants outstanding (in shares)							1,240,000	1,240,000
February 2021 Offering
Class of Warrant or Right [Line Items]
Percentage of warrants issued to purchase shares of common stock		7.00%
Exercise price (in dollars per share)		$ 12.81
2021 Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)		273,000					0
Exercise price (in dollars per share)		$ 12.81					$ 12.81
Warrants expired (in shares)							0
Class of warrant or right expiration period		5 years					5 years
Warrants exercised (in shares)							0	0
Duration of put option		30 days
Put option pay period		5 days
Warrants outstanding (in shares)							273,000	273,000
2021 Warrants \| Conversion price
Class of Warrant or Right [Line Items]
Conversion price (in dollars per share)							$ 12.81	$ 12.81
June 2020 Warrants
Class of Warrant or Right [Line Items]
Class of warrant or right expiration period							5 years 6 months
June 2020 Investor Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)							0
Exercise price (in dollars per share)				$ 5.18			$ 5.18
Warrants expired (in shares)							0
Class of warrant or right expiration period							5 years 6 months
Warrants exercised (in shares)							0	(270,000)
Duration of put option				30 days
Warrants outstanding (in shares)							127,000	127,000
June 2020 Placement Agent Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)				122,000			0
Exercise price (in dollars per share)				$ 5.64			$ 5.64
Warrants expired (in shares)							0
Class of warrant or right expiration period							5 years
Warrants exercised (in shares)							0	(83,000)
Warrants outstanding (in shares)							39,000	39,000
June 2020 Placement Agent Warrants \| Conversion price
Class of Warrant or Right [Line Items]
Conversion price (in dollars per share)							$ 5.64	$ 5.64
December 2019 warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)							0
Exercise price (in dollars per share)					$ 8.10		$ 8.10
Warrants expired (in shares)							0
Class of warrant or right expiration period					5 years		5 years
Warrants exercised (in shares)							0	0
Duration of put option					30 days
Put option pay period					5 days
Warrants outstanding (in shares)							556,000	556,000
December 2019 Placement Agent Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)							0
Exercise price (in dollars per share)							$ 8.44
Warrants expired (in shares)							0
Class of warrant or right expiration period							5 years
Warrants exercised (in shares)							0	0
Warrants outstanding (in shares)							52,000
December 2019 Placement Agent Warrants \| Conversion price
Class of Warrant or Right [Line Items]
Conversion price (in dollars per share)							$ 8.44	$ 8.44
May 2019 Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)							0
Exercise price (in dollars per share)							$ 3.52
Warrants expired (in shares)							0
Class of warrant or right expiration period							3 years
Warrants exercised (in shares)							0	(5,000)
Duration of put option						90 days
Put option pay period	5 days
Warrants outstanding (in shares)							193,000	193,000		444,000
May 2019 Warrants \| Conversion price
Class of Warrant or Right [Line Items]
Conversion price (in dollars per share)							$ 3.52	$ 3.52
Common Stock
Class of Warrant or Right [Line Items]
Common stock, shares, outstanding (in shares)							13,203,000	12,693,000	8,349,000
Exercise of warrants (in shares)								300,000
Over-allotment option \| February 2021 Offering
Class of Warrant or Right [Line Items]
Number of shares sold (in shares)		3,902,000
Sale of shares (in dollars per share)		$ 10.25
Value of shares sold		$ 40,000
Proceeds from issuance of common stock and warrants, net		$ 36,504
Expected term (years)		5 years
At-the-market offering
Class of Warrant or Right [Line Items]
Number of shares sold (in shares)							0
Sale of shares (in dollars per share)			$ 6.75
Value of shares sold			$ 7,500
At-the-market offering \| Common Stock
Class of Warrant or Right [Line Items]
Sale of stock, stock available for issuance, value							$ 6,668
Direct offering \| Common Stock
Class of Warrant or Right [Line Items]
Number warrants called (in shares)					556,000
Direct offering \| Common Stock \| June 2020 Investor Warrants
Class of Warrant or Right [Line Items]
Number warrants called (in shares)				874,000
Direct offering \| Common Stock \| May 2019 Warrants
Class of Warrant or Right [Line Items]
Sale of shares (in dollars per share)									$ 4.51