Unaudited Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	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	$ 38	$ 63,035	$ 1,066	$ (50,632)
Issuance of common stock for professional services, shares		31,250
Issuance of common stock for professional services, amount	231	$ 0	68	163
Fair value of stock options and restricted stock granted	469		469
Fair value of restricted stock units granted	60		60
Net loss	2,046				2,046
Balance, shares at Mar. 31, 2020		38,032,793
Balance, amount at Mar. 31, 2020	16,313	$ 38	63,632	1,229	(48,586)
Balance, shares at Dec. 31, 2019		38,001,543
Balance, amount at Dec. 31, 2019	13,507	$ 38	63,035	1,066	(50,632)
Net loss	(11,392)
Balance, shares at Jun. 30, 2020		51,026,636
Balance, amount at Jun. 30, 2020	26,721	$ 51	88,123	572	(62,025)
Balance, shares at Mar. 31, 2020		38,032,793
Balance, amount at Mar. 31, 2020	16,313	$ 38	63,632	1,229	(48,586)
Issuance of common stock for professional services, shares		218,750
Issuance of common stock for professional services, amount	189	$ 0	600	(411)
Fair value of stock options and restricted stock granted	479		479
Fair value of restricted stock units granted	60		60
Net loss	(13,439)				(13,439)
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	$ 1	1,417
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	$ 12	21,935	(246)
Balance, shares at Jun. 30, 2020		51,026,636
Balance, amount at Jun. 30, 2020	26,721	$ 51	88,123	572	(62,025)
Balance, shares at Dec. 31, 2020		59,476,268
Balance, amount at Dec. 31, 2020	21,279	$ 60	101,807	665	(81,253)
Issuance of common stock for professional services, shares		265,512
Issuance of common stock for professional services, amount	508	$ 0	363	145
Fair value of stock options and restricted stock granted	961		961
Fair value of restricted stock units granted	144		144
Net loss	(3,171)				(3,171)
Issuance of common stock from the equity incentive plan, shares		157,693
Issuance of common stock from the equity incentive plan, amount	138	$ 0	190	(52)
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	$ 60	103,465	758	(84,424)
Balance, shares at Dec. 31, 2020		59,476,268
Balance, amount at Dec. 31, 2020	21,279	$ 60	101,807	665	(81,253)
Net loss	(4,493)
Balance, shares at Jun. 30, 2021		62,877,959
Balance, amount at Jun. 30, 2021	21,193	$ 63	106,272	603	(85,745)
Balance, shares at Mar. 31, 2021		59,926,409
Balance, amount at Mar. 31, 2021	19,859	$ 60	103,465	758	(84,424)
Issuance of common stock for professional services, shares		381,000
Issuance of common stock for professional services, amount	243	$ 0	243
Fair value of stock options and restricted stock granted	591		591
Fair value of restricted stock units granted	143		143
Net loss	(1,321)				(1,321)
Issuance of common stock from the equity incentive plan, shares		141,693
Issuance of common stock from the equity incentive plan, amount	(157)	$ 0	(2)	(155)
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	$ 3	1,832
Balance, shares at Jun. 30, 2021		62,877,959
Balance, amount at Jun. 30, 2021	$ 21,193	$ 63	$ 106,272	$ 603	$ (85,745)