Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balances (in shares) at Dec. 31, 2020	24,626,004
Balances at Dec. 31, 2020	$ 25	$ 111,718	$ (94,113)	$ 17,630
Stock-based compensation	$ 0	4,218	0	4,218
Stock option exercises (in shares)	25,000
Stock option exercises	$ 0	35	0	35
Employee stock purchase plan (in shares)	69,884
Employee stock purchase plan	$ 0	171	0	171
Common stock issued related to restricted stock units (in shares)	0
Common stock issued related to restricted stock units	$ 0	0	0	0
Stock warrant exercises (in shares)	632,231
Stock warrant exercises	$ 0	45	0	45
Net income (loss)	$ 0	0	(9,021)	(9,021)
Balances (in shares) at Dec. 31, 2022	25,353,119
Balances at Dec. 31, 2022	$ 25	116,187	(103,134)	13,078
Stock-based compensation	$ 0	3,137	0	$ 3,137
Stock option exercises (in shares)				207,626
Employee stock purchase plan (in shares)	86,782			86,782
Employee stock purchase plan	$ 0	229	0	$ 229
Net income (loss)	$ 0	0	(936)	(936)
Stock option exercises and vesting of restricted stock units (in shares)	299,028
Stock option exercises and vesting of restricted stock units	$ 1	148	0	$ 149
Shares withheld related to net share settlement of stock option exercises (in shares)	(50,867)			(50,867)
Shares withheld related to net share settlement of stock option exercises	$ 0	(180)	0	$ (180)
Balances (in shares) at Dec. 31, 2023	25,688,062
Balances at Dec. 31, 2023	$ 26	119,521	(104,070)	15,477
Stock-based compensation	$ 0	3,165	0	$ 3,165
Stock option exercises (in shares)				266,353
Employee stock purchase plan (in shares)	80,933			80,933
Employee stock purchase plan	$ 0	248	0	$ 248
Net income (loss)	$ 0	0	(3,823)	(3,823)
Stock option exercises and vesting of restricted stock units (in shares)	356,755
Stock option exercises and vesting of restricted stock units	$ 0	1,191	0	1,191
Common stock issued in private placement offering (in shares)	583,334
Common stock issued in private placement offering	$ 1	6,999	0	7,000
Relative fair value of warrants issued in connection with debt	$ 0	1,170	0	1,170
Balances (in shares) at Dec. 31, 2024	26,709,084
Balances at Dec. 31, 2024	$ 27	$ 132,294	$ (107,893)	$ 24,428