Unaudited Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid-In Capital	Common Stock Issuable	Accumulated Deficit
Balance, shares at Dec. 31, 2019		38,001,543
Balance, amount at Dec. 31, 2019	$ 13,507,000	$ 38,000	$ 63,035,000	$ 1,066,000	$ (50,632,000)
Issuance of common stock for professional services, shares		31,250
Issuance of common stock for professional services, amount	231,000	$ 0	68,000	163,000
Fair value of stock options and restricted stock granted	469,000		469,000
Fair value of restricted stock units granted	60,000		60,000
Net loss	2,046,000				2,046,000
Balance, shares at Mar. 31, 2020		38,032,793
Balance, amount at Mar. 31, 2020	16,313,000	$ 38,000	63,632,000	1,229,000	(48,586,000)
Balance, shares at Dec. 31, 2019		38,001,543
Balance, amount at Dec. 31, 2019	13,507,000	$ 38,000	63,035,000	1,066,000	(50,632,000)
Net loss	(14,144,000)
Balance, shares at Sep. 30, 2020		51,219,519
Balance, amount at Sep. 30, 2020	24,624,000	$ 51,000	88,777,000	572,000	(64,776,000)
Balance, shares at Mar. 31, 2020		38,032,793
Balance, amount at Mar. 31, 2020	16,313,000	$ 38,000	63,632,000	1,229,000	(48,586,000)
Issuance of common stock for professional services, shares		218,750
Issuance of common stock for professional services, amount	189,000	$ 0	600,000	(411,000)
Fair value of stock options and restricted stock granted	479,000		479,000
Fair value of restricted stock units granted	60,000		60,000
Net loss	(13,439,000)				(13,439,000)
Issuance of common stock from the equity incentive plan, shares		8,003
Issuance of common stock from the equity incentive plan, amount	0	$ 0	0
Issuance of common stock from exercise of warrants, shares		708,467
Issuance of common stock from exercise of warrants, amount	1,418,000	$ 1,000	1,417,000
Issuance of common stock from settlement with Chemistry Holdings, Inc., shares		12,058,623
Issuance of common stock from settlement with Chemistry Holdings, Inc., amount	21,701,000	$ 12,000	21,935,000	(246,000)
Balance, shares at Jun. 30, 2020		51,026,636
Balance, amount at Jun. 30, 2020	26,721,000	$ 51,000	88,123,000	572,000	(62,025,000)
Issuance of common stock for professional services, shares		31,250
Issuance of common stock for professional services, amount	49,000	$ 0	49,000	0
Fair value of stock options and restricted stock granted	515,000		515,000
Fair value of restricted stock units granted	68,000		68,000
Net loss	(2,751,000)				(2,751,000)
Issuance of common stock from the equity incentive plan, shares		161,633
Issuance of common stock from the equity incentive plan, amount	22,000	$ 0	22,000
Balance, shares at Sep. 30, 2020		51,219,519
Balance, amount at Sep. 30, 2020	24,624,000	$ 51,000	88,777,000	572,000	(64,776,000)
Balance, shares at Dec. 31, 2020		59,476,268
Balance, amount at Dec. 31, 2020	21,279,000	$ 60,000	101,807,000	665,000	(81,253,000)
Issuance of common stock for professional services, shares		265,512
Issuance of common stock for professional services, amount	508,000	$ 0	363,000	145,000
Fair value of stock options and restricted stock granted	961,000		961,000
Fair value of restricted stock units granted	144,000		144,000
Net loss	(3,171,000)				(3,171,000)
Issuance of common stock from the equity incentive plan, shares		157,693
Issuance of common stock from the equity incentive plan, amount	138,000	$ 0	190,000	(52,000)
Issuance of common stock for exercise of warrants, shares		26,936
Issuance of common stock for exercise of warrants, amount	0	$ 0	0	0
Balance, shares at Mar. 31, 2021		59,926,409
Balance, amount at Mar. 31, 2021	19,859,000	$ 60,000	103,465,000	758,000	(84,424,000)
Balance, shares at Dec. 31, 2020		59,476,268
Balance, amount at Dec. 31, 2020	21,279,000	$ 60,000	101,807,000	665,000	(81,253,000)
Net loss	(8,835,000)
Balance, shares at Sep. 30, 2021		65,060,044
Balance, amount at Sep. 30, 2021	18,585,000	$ 66,000	108,004,000	603,000	(90,088,000)
Balance, shares at Mar. 31, 2021		59,926,409
Balance, amount at Mar. 31, 2021	19,859,000	$ 60,000	103,465,000	758,000	(84,424,000)
Issuance of common stock for professional services, shares		381,000
Issuance of common stock for professional services, amount	243,000	$ 0	243,000
Fair value of stock options and restricted stock granted	591,000		591,000
Fair value of restricted stock units granted	143,000		143,000
Net loss	(1,321,000)				(1,321,000)
Issuance of common stock from the equity incentive plan, shares		141,693
Issuance of common stock from the equity incentive plan, amount	(157,000)	$ 0	(2,000)	(155,000)
Issuance of common stock from conversion of convertible promissory notes, shares		2,428,857
Issuance of common stock from conversion of convertible promissory notes, amount	1,835,000	$ 3,000	1,832,000
Balance, shares at Jun. 30, 2021		62,877,959
Balance, amount at Jun. 30, 2021	21,193,000	$ 63,000	106,272,000	603,000	(85,745,000)
Issuance of common stock for professional services, amount	0
Fair value of stock options and restricted stock granted	532,000		532,000
Fair value of restricted stock units granted	156,000		156,000
Net loss	(4,343,000)				(4,343,000)
Issuance of common stock from the equity incentive plan, shares		572,975
Issuance of common stock from the equity incentive plan, amount	0	$ 1,000	(1,000)
Issuance of common stock from conversion of convertible promissory notes, shares		1,609,110
Issuance of common stock from conversion of convertible promissory notes, amount	1,047,000	$ 2,000	1,045,000
Balance, shares at Sep. 30, 2021		65,060,044
Balance, amount at Sep. 30, 2021	$ 18,585,000	$ 66,000	$ 108,004,000	$ 603,000	$ (90,088,000)