Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	At The Market Offering [Member]	Private Placement [Member]	Common Stock 0.00001 Par Value [Member]	Common Stock 0.00001 Par Value [Member] At The Market Offering [Member]	Common Stock 0.00001 Par Value [Member] Private Placement [Member]	Additional Paid-in Capital	Additional Paid-in Capital At The Market Offering [Member]	Additional Paid-in Capital Private Placement [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2020	$ 67,852						$ 575,811			$ (507,959)
Beginning balance, shares at Dec. 31, 2020				27,821,685
Net loss	(6,250)									(6,250)
Stock compensation expense	976						976
Vesting of restricted stock units	(2,613)						(2,613)
Vesting of restricted stock units, shares				246,737
Proceeds from employee stock option exercises	463						463
Proceeds from employee stock option exercises, shares				48,056
Proceeds from offering, net		$ 6,215						$ 6,215
Proceeds from offering, net, shares					305,182
Forfeiture of performance-based restricted stock, shares				(78,125)
Ending balance at Mar. 31, 2021	66,643						580,852			(514,209)
Ending balance, shares at Mar. 31, 2021				28,343,535
Beginning balance at Dec. 31, 2020	67,852						575,811			(507,959)
Beginning balance, shares at Dec. 31, 2020				27,821,685
Net loss	(12,919)
Ending balance at Jun. 30, 2021	147,148						668,026			(520,878)
Ending balance, shares at Jun. 30, 2021				32,907,101
Beginning balance at Mar. 31, 2021	66,643						580,852			(514,209)
Beginning balance, shares at Mar. 31, 2021				28,343,535
Net loss	(6,669)									(6,669)
Stock compensation expense	1,070						1,070
Issuance of restricted stock, shares				476,550
Vesting of restricted stock units	(64)						(64)
Vesting of restricted stock units, shares				6,207
Proceeds from employee stock option exercises	230						230
Proceeds from employee stock option exercises, shares				23,886
Proceeds from offering, net		12,352	$ 73,586					12,352	$ 73,586
Proceeds from offering, net, shares					594,799	3,462,124
Ending balance at Jun. 30, 2021	147,148						668,026			(520,878)
Ending balance, shares at Jun. 30, 2021				32,907,101
Beginning balance at Dec. 31, 2021	128,408						673,461			(545,053)
Beginning balance, shares at Dec. 31, 2021				33,218,115
Net loss	(19,484)									(19,484)
Stock compensation expense	1,828						1,828
Vesting of restricted stock units	(2,315)						2,315
Vesting of restricted stock units, shares				166,211
Proceeds from employee stock option exercises	38						38
Proceeds from employee stock option exercises, shares				4,681
Proceeds from offering, net		23,272	$ 49,864					23,272	$ 49,864
Proceeds from offering, net, shares					737,288	1,791,986
Ending balance at Mar. 31, 2022	181,611						746,148			(564,537)
Ending balance, shares at Mar. 31, 2022				35,918,281
Beginning balance at Dec. 31, 2021	128,408						673,461			(545,053)
Beginning balance, shares at Dec. 31, 2021				33,218,115
Net loss	$ (43,534)
Proceeds from offering, net, shares	882,288
Ending balance at Jun. 30, 2022	$ 164,754						753,341			(588,587)
Ending balance, shares at Jun. 30, 2022				36,478,284
Beginning balance at Mar. 31, 2022	181,611						746,148			(564,537)
Beginning balance, shares at Mar. 31, 2022				35,918,281
Net loss	(24,050)									(24,050)
Stock compensation expense	2,295						2,295
Issuance of restricted stock, shares				391,324
Vesting of restricted stock units	(24)						24
Vesting of restricted stock units, shares				2,569
Proceeds from employee stock option exercises	136						136
Proceeds from employee stock option exercises, shares				21,110
Proceeds from offering, net		$ 4,786						$ 4,786
Proceeds from offering, net, shares					145,000
Ending balance at Jun. 30, 2022	$ 164,754						$ 753,341			$ (588,587)
Ending balance, shares at Jun. 30, 2022				36,478,284