CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY - USD ($)	Series 1 warrants Additional paid-in capital	Series 1 warrants	Series 2 warrants Additional paid-in capital	Series 2 warrants	Series 3 warrants Common Stock Common stock - voting	Series 3 warrants Additional paid-in capital	Series 3 warrants	Series 1 and Series 2 warrants Common Stock Common stock - voting	Series 1 and Series 2 warrants Additional paid-in capital	Series 1 and Series 2 warrants	Series 1, Series 2, and 2019 Bridge Note warrants Common Stock Common stock - voting	Series 1, Series 2, and 2019 Bridge Note warrants Additional paid-in capital	Series 1, Series 2, and 2019 Bridge Note warrants	Series 1, Series 2, and 2019 Bridge Note warrants May 2020 Common Stock Common stock - voting	Series 1, Series 2, and 2019 Bridge Note warrants May 2020 Additional paid-in capital	Series 1, Series 2, and 2019 Bridge Note warrants May 2020	Series 1, Series 2, and 2019 Bridge Note warrants June 2020 Common Stock Common stock - voting	Series 1, Series 2, and 2019 Bridge Note warrants June 2020 Additional paid-in capital	Series 1, Series 2, and 2019 Bridge Note warrants June 2020	Series 2 warrants and inducement offer conversion of Series B-1 convertible preferred stock Common Stock Common stock - voting	Series 2 warrants and inducement offer conversion of Series B-1 convertible preferred stock Additional paid-in capital	Series 2 warrants and inducement offer conversion of Series B-1 convertible preferred stock	Series B-2 convertible preferred stock Common Stock Common stock - voting	Series B-2 convertible preferred stock Additional paid-in capital	Series B-2 convertible preferred stock Series B-2 convertible preferred stock	Series B convertible preferred stock Common Stock Common stock - voting	Series B convertible preferred stock Additional paid-in capital	Series B convertible preferred stock Series B convertible preferred stock	Series B convertible preferred stock	PIPE Financing Warrants, Dec 2019	Bridge Note Warrants Additional paid-in capital	Bridge Note Warrants	LOC warrant Additional paid-in capital	LOC warrant	March 2020 Equity Purchase Agreement Common Stock Common stock - voting	March 2020 Equity Purchase Agreement Additional paid-in capital	March 2020 Equity Purchase Agreement	Underwriter Settlement Agreement Common Stock Common stock - voting	Underwriter Settlement Agreement Additional paid-in capital	Underwriter Settlement Agreement	Common Stock Series B convertible preferred stock	Common Stock Common stock - voting	Common Stock Common stock - non-voting	Additional paid-in capital Series B convertible preferred stock	Additional paid-in capital	Accumulated deficit	Series A convertible preferred stock	Series B convertible preferred stock	Series B-1 convertible preferred stock	Series B-2 convertible preferred stock	Series C perpetual preferred stock	Total
Beginning Balance at Dec. 31, 2018																																															$ 9,000,000
Beginning Balance (in shares) at Dec. 31, 2018																																															5,524,926
Ending Balance at Sep. 30, 2019																																															$ 9,000,000	$ 410,000
Ending Balance (in shares) at Sep. 30, 2019																																															5,524,926	1,971
Beginning Balance at Dec. 31, 2018																																											$ 4,000		$ 99,930,000	$ (94,551,000)						$ 5,383,000
Beginning Balance (in shares) at Dec. 31, 2018																																										351,472	40,301,237
Increase (decrease) in Stockholders' Equity (Deficit)
Deemed dividend on the Series B convertible preferred stock																											$ (3,876,000)	$ 3,876,000
Deemed dividend attributable to Series 1 warrant modification	$ (252,000)	$ (252,000)
Issuance of common stock in Class A Units, net																																													1,201,000							1,201,000
Issuance of common stock in Class A Units, net (in shares)																																										2,886,500
Issuance of warrants	5,305,000	5,305,000	$ 5,305,000	$ 5,305,000
Issuance of common stock in exchange of notes payable and accrued interest																																										$ 1,000			8,223,000							8,224,000
Issuance of common stock in exchange of notes payable and accrued interest (in shares)																																										395,970
Issuance of common stock upon conversion of Series B convertible preferred stock																																												$ 1,831,000				$ (1,831,000)
Issuance of common stock upon conversion of Series B convertible preferred stock (in shares)																																									4,408,000							(8,816)
Beneficial conversion feature of convertible preferred stock																											3,876,000	(3,876,000)
Modification of Series 1 warrants	252,000	252,000
Warrant reclassification from liability to equity																															$ 4,259,000	$ 4,259,000	$ 71,000	$ 71,000
Fractional shares (in shares)																																										(14)
Issuance of common stock, net of offering costs																																													2,602,000							2,602,000
Issuance of common stock, net of offering costs (in shares)																																										195,319
Issuance of common stock in exchange of accrued interest, January 2019																																													447,000							447,000
Issuance of common stock in exchange of accrued interest, January 2019 (in shares)																																										19,752
Issuance of common stock, net of offering costs, March 2019																																													266,000							266,000
Issuance of common stock, net of offering costs, March 2019 (in shares)																																										19,019
Shares issued in exchange of CVP Exchange Notes																																													6,673,000							6,673,000
Shares issued in exchange of CVP Exchange Notes (in shares)																																										1,119,440
Issuance of Series B convertible preferred stock, net																												$ 2,241,000	$ 2,241,000
Issuance of Series B convertible preferred stock, net (in shares)																												10,787
Stock-based compensation																																													1,983,000							1,983,000
Net loss																																														(32,580,000)						(32,580,000)
Ending Balance at Sep. 30, 2019																																										$ 1,000	$ 4,000		138,096,000	(127,131,000)		$ 410,000				11,380,000
Ending Balance (in shares) at Sep. 30, 2019																																										9,395,458	40,301,237					1,971
Beginning Balance at Dec. 31, 2018																																															$ 9,000,000
Beginning Balance (in shares) at Dec. 31, 2018																																															5,524,926
Ending Balance at Dec. 31, 2019																																															$ 9,895,000
Ending Balance (in shares) at Dec. 31, 2019																																															5,524,926	1,971	0	10,165
Beginning Balance at Dec. 31, 2018																																											$ 4,000		99,930,000	(94,551,000)						5,383,000
Beginning Balance (in shares) at Dec. 31, 2018																																										351,472	40,301,237
Increase (decrease) in Stockholders' Equity (Deficit)
Issuance of common stock in PIPE financing, net of issuance costs of $51																														$ 1,035,000
Ending Balance at Dec. 31, 2019																																										$ 1,000	$ 4,000		142,046,000	(133,090,000)		$ 476,000		$ 1,236,000		10,673,000
Ending Balance (in shares) at Dec. 31, 2019																																										14,273,061	40,301,237					1,971		10,165
Beginning Balance at Jun. 30, 2019																																															$ 9,000,000
Beginning Balance (in shares) at Jun. 30, 2019																																															5,524,926
Ending Balance at Sep. 30, 2019																																															$ 9,000,000	$ 410,000
Ending Balance (in shares) at Sep. 30, 2019																																															5,524,926	1,971
Beginning Balance at Jun. 30, 2019																																										$ 1,000	$ 4,000		117,925,000	(119,576,000)						(1,646,000)
Beginning Balance (in shares) at Jun. 30, 2019																																										1,799,381	40,301,237
Increase (decrease) in Stockholders' Equity (Deficit)
Deemed dividend on the Series B convertible preferred stock																																													(3,876,000)			$ 3,876,000
Deemed dividend attributable to Series 1 warrant modification	(252,000)	(252,000)
Issuance of common stock in Class A Units, net																																													1,201,000							1,201,000
Issuance of common stock in Class A Units, net (in shares)																																										2,886,500
Issuance of warrants	5,305,000	5,305,000	$ 5,305,000	$ 5,305,000
Issuance of common stock upon conversion of Series B convertible preferred stock																																													1,831,000			$ (1,831,000)
Issuance of common stock upon conversion of Series B convertible preferred stock (in shares)																																										4,408,000						(8,816)
Beneficial conversion feature of convertible preferred stock																																													3,876,000			$ (3,876,000)
Modification of Series 1 warrants	$ 252,000	$ 252,000
Warrant reclassification from liability to equity																															$ 4,259,000	$ 4,259,000	$ 71,000	$ 71,000
Shares issued in exchange of CVP Exchange Notes																																													1,089,000							1,089,000
Shares issued in exchange of CVP Exchange Notes (in shares)																																										301,577
Issuance of Series B convertible preferred stock, net																																																$ 2,241,000				2,241,000
Issuance of Series B convertible preferred stock, net (in shares)																																																10,787
Stock-based compensation																																													1,110,000							1,110,000
Net loss																																														(7,555,000)						(7,555,000)
Ending Balance at Sep. 30, 2019																																										$ 1,000	$ 4,000		138,096,000	(127,131,000)		$ 410,000				11,380,000
Ending Balance (in shares) at Sep. 30, 2019																																										9,395,458	40,301,237					1,971
Beginning Balance at Dec. 31, 2019																																															$ 9,895,000
Beginning Balance (in shares) at Dec. 31, 2019																																															5,524,926	1,971	0	10,165
Increase (decrease) in temporary equity
Series A convertible preferred stock redeemed and Series C perpetual preferred issued under the exchange transaction																																													(150,000)		$ 11,227,000				$ (4,717,000)	(4,867,000)
Series A convertible preferred stock redeemed and Series C perpetual preferred issued under the exchange transaction (in shares)																																															(5,524,926)				842,500
Ending Balance (in shares) at Sep. 30, 2020																																																0	0	7,534
Beginning Balance at Dec. 31, 2019																																										$ 1,000	$ 4,000		142,046,000	(133,090,000)		$ 476,000		$ 1,236,000		10,673,000
Beginning Balance (in shares) at Dec. 31, 2019																																										14,273,061	40,301,237					1,971		10,165
Increase (decrease) in Stockholders' Equity (Deficit)
Issuance of warrants																																							$ 31,000	$ 31,000
Issuance of common stock to Oasis, put exercise																																					$ 10,000
Issuance of common stock to Oasis, put exercise (in shares)																																				10,000
Issuance of common stock in exchange for services																																					$ 33,000
Issuance of common stock in exchange for services (in shares)																																			52,000	33,000
Fractional shares (in shares)																																										20
Value of shares issued on exercise of warrants					$ 1,000	$ 5,992,000	$ 5,993,000		$ 565,000	$ 565,000		$ 392,000	$ 392,000	$ 1,000	$ 3,787,000	$ 3,788,000		$ 359,000	$ 359,000	$ 1,000	$ 2,340,000	$ 2,341,000
Shares issued on exercise of warrants					8,248,330			1,154,266			548,962			8,670,852			732,315			1,250,000
Issuance of common stock in PIPE financing, net of issuance costs of $51																																													668,000							668,000
Issuance of common stock (In shares)																																						100,000				1,714,283
Shares issued in Underwriter settlement agreement (in USD)																																							45,000	45,000
Underwriter settlement offering cost																																							$ (185,000)	$ (185,000)
Conversion of Series B convertible preferred stock into common stock																								$ 320,000	$ (320,000)		$ 476,000	$ (476,000)
Conversion of Series B convertible preferred stock into common stock (shares)																							499,890		(2,631)	4,423,251		(1,971)							68,807
Stock dividend attributable to Series C perpetual preferred stock of $8 per share																																													(56,000)						$ 56,000
Stock dividend attributable to Series C perpetual preferred stock of $8 per share (in shares)																																																			7,021
Shares issued to third party for services																																													916,000							916,000
Shares issued to third party for services (in shares)																																										2,364,474
Shares issued in exchange of CVP Exchange Notes																																										$ 1,000			1,497,000							1,498,000
Shares issued in exchange of CVP Exchange Notes (in shares)																																										4,761,904
Accretion to redemption value of Series A redeemable convertible preferred stock																																													(1,332,000)		$ 1,332,000					$ (1,332,000)
Shares issued upon exercise of stock options (in shares)																																										555										555
Stock-based compensation																																													2,184,000							$ 2,184,000
Net loss																																														(25,040,000)						(25,040,000)
Ending Balance at Sep. 30, 2020																																										$ 5,000	$ 4,000		160,238,000	(158,130,000)				$ 916,000	$ 4,773,000	7,806,000
Ending Balance (in shares) at Sep. 30, 2020																																										48,862,970	40,301,237							7,534	849,521
Beginning Balance at Jun. 30, 2020																																															$ 10,878,000
Beginning Balance (in shares) at Jun. 30, 2020																																															5,524,926
Increase (decrease) in temporary equity
Series A convertible preferred stock redeemed and Series C perpetual preferred issued under the exchange transaction																																															$ (11,227,000)
Series A convertible preferred stock redeemed and Series C perpetual preferred issued under the exchange transaction (in shares)																																															(5,524,926)
Accretion to redemption value of redeemable preferred stock																																															$ 349,000
Ending Balance (in shares) at Sep. 30, 2020																																																0	0	7,534
Beginning Balance at Jun. 30, 2020																																										$ 3,000	$ 4,000		150,885,000	(150,264,000)				$ 916,000		1,544,000
Beginning Balance (in shares) at Jun. 30, 2020																																										32,408,421	40,301,237							7,534
Increase (decrease) in Stockholders' Equity (Deficit)
Accretion to redemption value of redeemable preferred stock																																													(349,000)							(349,000)
Fractional shares (in shares)																																										20
Value of shares issued on exercise of warrants					$ 1,000	$ 5,992,000	$ 5,993,000		$ 565,000	$ 565,000
Shares issued on exercise of warrants					8,248,330			1,154,266
Series A convertible preferred stock redeemed and Series C perpetual preferred issued under the exchange transaction																																													150,000						$ 4,717,000	4,867,000
Series A convertible preferred stock redeemed and Series C perpetual preferred issued under the exchange transaction (in shares)																																																			842,500
Stock dividend attributable to Series C perpetual preferred stock of $8 per share																																													(56,000)						$ 56,000
Stock dividend attributable to Series C perpetual preferred stock of $8 per share (in shares)																																																			7,021
Shares issued to third party for services																																													879,000							879,000
Shares issued to third party for services (in shares)																																										2,289,474
Shares issued in exchange of CVP Exchange Notes																																										$ 1,000			1,497,000							1,498,000
Shares issued in exchange of CVP Exchange Notes (in shares)																																										4,761,904
Shares issued upon exercise of stock options (in shares)																																										555
Stock-based compensation																																													675,000							675,000
Net loss																																														(7,866,000)						(7,866,000)
Ending Balance at Sep. 30, 2020																																										$ 5,000	$ 4,000		$ 160,238,000	$ (158,130,000)				$ 916,000	$ 4,773,000	$ 7,806,000
Ending Balance (in shares) at Sep. 30, 2020																																										48,862,970	40,301,237							7,534	849,521