Common Stock and Common Stock Purchase Warrants (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	9 Months Ended
	Aug. 03, 2022	Apr. 03, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Aug. 31, 2022	Dec. 31, 2021
Class of Warrant or Right [Line Items]
Common stock, shares authorized				250,000,000			250,000,000
Increase in common stock shares authorized				100,000,000
Stock option exercised, value			$ 823	$ 302	$ 953
Face value principal payable				$ 33,761
Series Z Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant exercise price				$ 1.60
Number of warrants exercised				5
Series Z Warrants [Member]
Class of Warrant or Right [Line Items]
Common stock purchase warrants issued and outstanding				11,937,450			11,937,455
Warrant exercise price				$ 1.60			$ 1.60
Warrants expiration date				Apr. 30, 2024			Apr. 30, 2024
Series W Warrants [Member]
Class of Warrant or Right [Line Items]
Common stock purchase warrants issued and outstanding							377,873
Warrants expiration date							Jan. 29, 2022
Senior Convertible Note [Member]
Class of Warrant or Right [Line Items]
Stock issued during period, share, conversion of units	5,103,908
Face value principal payable						$ 4,989
Stock issued during period, value, conversion of units		$ 11
2014 Equity Plan [Member]
Class of Warrant or Right [Line Items]
Stock option exercised				299,999
2014 Equity Plan [Member] | Equity Option [Member]
Class of Warrant or Right [Line Items]
Stock option exercised				299,999
Stock option exercised, value				$ 302
Employee Stock Purchase Plan [Member]
Class of Warrant or Right [Line Items]
Employee stock purchase plans				385,938