Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited)

v3.20.2

Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	November 2019 Offering [Member] Preferred Stock [Member] Series A Preferred Stock [Member]	November 2019 Offering [Member] Preferred Stock [Member] Series B Preferred Stock [Member]	November 2019 Offering [Member] Common Stock [Member]	November 2019 Offering [Member] Additional Paid-in Capital [Member]	November 2019 Offering [Member] Retained Earnings [Member]	November 2019 Offering [Member]	Purchase Agreement with LPC [Member] Preferred Stock [Member] Series A Preferred Stock [Member]	Purchase Agreement with LPC [Member] Preferred Stock [Member] Series B Preferred Stock [Member]	Purchase Agreement with LPC [Member] Common Stock [Member]	Purchase Agreement with LPC [Member] Additional Paid-in Capital [Member]	Purchase Agreement with LPC [Member] Retained Earnings [Member]	Purchase Agreement with LPC [Member]	Series A Warrants [Member] Preferred Stock [Member] Series A Preferred Stock [Member]	Series A Warrants [Member] Preferred Stock [Member] Series B Preferred Stock [Member]	Series A Warrants [Member] Common Stock [Member]	Series A Warrants [Member] Additional Paid-in Capital [Member]	Series A Warrants [Member] Retained Earnings [Member]	Series A Warrants [Member]	Series B Warrants [Member] Preferred Stock [Member] Series A Preferred Stock [Member]	Series B Warrants [Member] Preferred Stock [Member] Series B Preferred Stock [Member]	Series B Warrants [Member] Common Stock [Member]	Series B Warrants [Member] Additional Paid-in Capital [Member]	Series B Warrants [Member] Retained Earnings [Member]	Series B Warrants [Member]	Director [Member] Preferred Stock [Member] Series A Preferred Stock [Member]	Director [Member] Preferred Stock [Member] Series B Preferred Stock [Member]	Director [Member] Common Stock [Member]	Director [Member] Additional Paid-in Capital [Member]	Director [Member] Retained Earnings [Member]	Director [Member]	Consultant [Member] Preferred Stock [Member] Series A Preferred Stock [Member]	Consultant [Member] Preferred Stock [Member] Series B Preferred Stock [Member]	Consultant [Member] Common Stock [Member]	Consultant [Member] Additional Paid-in Capital [Member]	Consultant [Member] Retained Earnings [Member]	Consultant [Member]	Employees [Member] Preferred Stock [Member] Series A Preferred Stock [Member]	Employees [Member] Preferred Stock [Member] Series B Preferred Stock [Member]	Employees [Member] Common Stock [Member]	Employees [Member] Additional Paid-in Capital [Member]	Employees [Member] Retained Earnings [Member]	Employees [Member]	Preferred Stock [Member] Series A Preferred Stock [Member]	Preferred Stock [Member] Series B Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Series B Preferred Stock [Member]	Total
Balances (in shares) at Dec. 31, 2018																																													463,630
Balances at Dec. 31, 2018																																														$ 160,297	$ (155,385)		$ 4,912
Stock-based compensation expense																																														470			470
Issuance of common shares from employee stock purchase plan (in shares)																																													429
Issuance of common shares from employee stock purchase plan																																														35			35
Issuance of restricted common shares in connection with consulting agreement (in shares)																																													274
Issuance of restricted common shares in connection with consulting agreement																																														25			25
Net loss																																															(10,029)		(10,029)
Restricted stock awards (in shares)																																													6
Restricted stock awards																																														1			1
Balances (in shares) at Mar. 31, 2019																																													464,339
Balances at Mar. 31, 2019																																														160,828	(165,414)		(4,586)
Balances (in shares) at Dec. 31, 2018																																													463,630
Balances at Dec. 31, 2018																																														160,297	(155,385)		4,912
Net loss																																																	(19,753)
Balances (in shares) at Jun. 30, 2019																																													465,722
Balances at Jun. 30, 2019																																														161,469	(175,138)		(13,669)
Balances (in shares) at Dec. 31, 2018																																													463,630
Balances at Dec. 31, 2018																																														160,297	(155,385)		4,912
Series B convertible preferred stock dividends paid in PIK shares (in shares)																																																378
Balances (in shares) at Dec. 31, 2019																																											1,852,173	31,678	7,075,684
Balances at Dec. 31, 2019																																													$ 1	214,431	(197,911)		16,521	[1]
Balances (in shares) at Mar. 31, 2019																																													464,339
Balances at Mar. 31, 2019																																														160,828	(165,414)		(4,586)
Stock-based compensation expense																																														562			562
Issuance of common shares from employee stock purchase plan (in shares)																																													602
Issuance of common shares from employee stock purchase plan																																														20			20
Net loss																																															(9,724,000)		(9,724)
Restricted stock awards (in shares)																											525						250						6
Restricted stock awards																												$ 48		$ 48				$ 11		$ 11
Balances (in shares) at Jun. 30, 2019																																													465,722
Balances at Jun. 30, 2019																																														161,469	(175,138)		(13,669)
Balances (in shares) at Dec. 31, 2019																																											1,852,173	31,678	7,075,684
Balances at Dec. 31, 2019																																													$ 1	214,431	(197,911)		16,521	[1]
Issuance costs				$ (30)		$ (30)
Conversion of Series A convertible preferred stock into common stock (in shares)																																											(1,852,173)		1,852,173
Conversion of Series A convertible preferred stock into common stock
Issuance of common shares in connection with warrant exercises (in shares)															1,026,240						45,473
Issuance of common shares in connection with warrant exercises																$ 1,591		$ 1,591				$ 70		$ 70
Series B convertible preferred stock dividends																																														(990)			(990)
Series B convertible preferred stock dividends paid in PIK shares (in shares)																																												989
Series B convertible preferred stock dividends paid in PIK shares																																														989			989
Stock-based compensation expense																																														686			686
Issuance of common shares from employee stock purchase plan (in shares)																																													320
Issuance of common shares from employee stock purchase plan
Issuance of restricted common shares in connection with consulting agreement (in shares)																																													28,313
Issuance of restricted common shares in connection with consulting agreement																																														24			24
Net loss																																															(6,310)		(6,310)
Balances (in shares) at Mar. 31, 2020																																												32,667	10,028,203
Balances at Mar. 31, 2020																																													$ 1	216,771	(204,221)		12,551
Balances (in shares) at Dec. 31, 2019																																											1,852,173	31,678	7,075,684
Balances at Dec. 31, 2019																																													$ 1	214,431	(197,911)		16,521	[1]
Series B convertible preferred stock dividends paid in PIK shares (in shares)																																																2,007
Net loss																																																	(13,425)
Balances (in shares) at Jun. 30, 2020																																												33,685	15,734,058
Balances at Jun. 30, 2020																																													$ 2	221,961	(211,336)		10,627
Balances (in shares) at Mar. 31, 2020																																												32,667	10,028,203
Balances at Mar. 31, 2020																																													$ 1	216,771	(204,221)		12,551
Issuance costs				$ (3)		$ (3)				$ (452)		$ (452)
Issuance of common shares in connection with warrant exercises (in shares)															4,852,284						293,490
Issuance of common shares in connection with warrant exercises															$ 1	2,959		2,960				179		179
Series B convertible preferred stock dividends																																														(1,021)			(1,021)
Series B convertible preferred stock dividends paid in PIK shares (in shares)																																												1,018				1,018
Series B convertible preferred stock dividends paid in PIK shares																																														1,018			1,018
Stock-based compensation expense																																														632			632
Issuance of common shares from employee stock purchase plan (in shares)																																													300
Issuance of common shares from employee stock purchase plan
Issuance of restricted common shares in connection with consulting agreement (in shares)																																													34,531
Issuance of restricted common shares in connection with consulting agreement																																														25			25
Net loss																																															(7,115)		(7,115)
Modification of warrants in connection with 2020 Warrant Offering																$ 997		$ 997				$ 841		$ 841
Issuance of Series A-2 and B-2 warrants in connection with 2020 Warrant Offering																																														1,838			1,838
Issuance costs for Series A-2 and B-2 warrants in connection with 2020 Warrant Offering																																														(1,838)			(1,838)
Transaction costs in connection with 2020 Warrant Offering																																														(326)			(326)
Issuance of initial purchase common shares under the Purchase Agreement with LPC (in shares)																																													525,000
Issuance of initial purchase common shares under the Purchase Agreement with LPC																																														341			341
Restricted stock awards (in shares)																																													250
Restricted stock awards
Balances (in shares) at Jun. 30, 2020																																												33,685	15,734,058
Balances at Jun. 30, 2020																																													$ 2	$ 221,961	$ (211,336)		$ 10,627
[1] The condensed consolidated balance sheet as of December 31, 2019 has been derived from the audited consolidated financial statements as of that date.