Annual report [Section 13 and 15(d), not S-K Item 405]

Consolidated Statements of Stockholders' Equity

Consolidated Statements of Stockholders' Equity - USD ($)	Public Offering [Member] Common Stock Outstanding [Member]	Public Offering [Member] Additional Paid-in Capital [Member]	Public Offering [Member] Retained Earnings [Member]	Public Offering [Member] Treasury Stock, Common [Member]	Public Offering [Member]	Yulho agreement [Member] Common Stock Outstanding [Member]	Yulho agreement [Member] Additional Paid-in Capital [Member]	Yulho agreement [Member] Retained Earnings [Member]	Yulho agreement [Member] Treasury Stock, Common [Member]	Yulho agreement [Member]	ATM [Member] Common Stock Outstanding [Member]	ATM [Member] Additional Paid-in Capital [Member]	ATM [Member] Retained Earnings [Member]	ATM [Member] Treasury Stock, Common [Member]	ATM [Member]	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
Balance (in shares) at Dec. 31, 2022																3,974,088			0
Balance at Dec. 31, 2022																$ 4,000	$ 220,189,000	$ (199,277,000)	$ 0	$ 20,916,000
Stock-based compensation																$ 0	2,532,000	0	$ 0	2,532,000
RSUs issued for consulting services (in shares)																789			0
RSUs issued for consulting services																$ 0	12,000	0	$ 0	12,000
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting (in shares)																81,675			21,428
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting																$ 0	(578,000)	0	$ (516,000)	(1,094,000)
Common stock, Issued (in shares)	909,650			0		227,273			0		162,215			0	162,215	5,212			0
Common stock, Issued	$ 1,000	$ 18,317,000	$ 0	$ 0	$ 18,318,000	$ 0	$ 4,629,000	$ 0	$ 0	$ 4,629,000	$ 0	$ 3,789,000	$ 0	$ 0	$ 3,789,000	$ 0	96,000	0	$ 0	96,000
Warrant expense related to Yulho agreement																$ 0	181,000	0	$ 0	$ 181,000
Common stock issued for employee stock purchase plan sales (in shares)																9,635			0	9,635
Common stock issued for employee stock purchase plan sales																$ 0	122,000	0	$ 0	$ 122,000
Common stock issued for class action settlement (in shares)																23,468			0	23,468
Common stock issued for class action settlement																$ 0	501,000	0	$ 0	$ 501,000
Net loss																$ 0	0	(23,938,000)	0	(23,938,000)
Balance (in shares) at Dec. 31, 2023																5,394,005
Balance at Dec. 31, 2023																$ 5,000	249,790,000	(223,215,000)	$ (516,000)	$ 26,064,000
Balance (in shares) at Dec. 31, 2023																			21,428	21,428
Stock-based compensation																$ 0	2,726,000	0	$ 0	$ 2,726,000
RSUs issued for consulting services (in shares)																20,111			0	20,111
RSUs issued for consulting services																$ 0	150,000	0	$ 0	$ 150,000
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting (in shares)																95,851			7,991
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting																$ 1,000	(876,000)	0	$ 324,000	(551,000)
Common stock, Issued (in shares)	1,006,250			0							1,195,034			0	1,195,034	9,428			0
Common stock, Issued	$ 1,000	$ 7,305,000	$ 0	$ 0	$ 7,306,000						$ 1,000	$ 5,013,000	$ 0	$ 0	$ 5,014,000	$ 0	37,000	0	$ 0	$ 37,000
Common stock issued for employee stock purchase plan sales (in shares)																10,635			0	10,635
Common stock issued for employee stock purchase plan sales																$ 0	54,000	0	$ 0	$ 54,000
Net loss																$ 0	0	(24,555,000)	$ 0	(24,555,000)
Common stock cancelled for cash in lieu of fractional shares reverse split (in shares)																(478)			0
Common stock cancelled for cash in lieu of fractional shares reverse split																$ 0	(1,000)	0	$ 0	(1,000)
Common stock cancelled for cash in lieu of fractional shares reverse split (in shares)																478			0
Balance (in shares) at Dec. 31, 2024																7,730,836
Balance at Dec. 31, 2024																$ 8,000	$ 264,198,000	$ (247,770,000)	$ (192,000)	$ 16,244,000
Balance (in shares) at Dec. 31, 2024																			29,419	29,419