Condensed Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2021	$ 2	$ 180,067	$ (152,831)	$ 27,238
Balance (in shares) at Dec. 31, 2021	19,858,460
Increase (Decrease) in Stockholders' Equity
Exercise of stock options		69		69
Exercise of stock options (in shares)	15,830
Issuance of common stock under stock incentive plans (in shares)	96,496
Stock-based compensation expense		824		824
Net income (loss)			1,935	1,935
Balance at Mar. 31, 2022	$ 2	180,960	(150,896)	30,066
Balance (in shares) at Mar. 31, 2022	19,970,786
Balance at Dec. 31, 2021	$ 2	180,067	(152,831)	27,238
Balance (in shares) at Dec. 31, 2021	19,858,460
Increase (Decrease) in Stockholders' Equity
Net income (loss)				3,606
Balance at Jun. 30, 2022	$ 2	182,488	(149,225)	33,265
Balance (in shares) at Jun. 30, 2022	20,137,520
Balance at Mar. 31, 2022	$ 2	180,960	(150,896)	30,066
Balance (in shares) at Mar. 31, 2022	19,970,786
Increase (Decrease) in Stockholders' Equity
Exercise of stock options		50		50
Exercise of stock options (in shares)	18,131
Issuance of common stock under stock incentive plans		167		167
Issuance of common stock under stock incentive plans (in shares)	148,603
Stock-based compensation expense		1,311		1,311
Net income (loss)			1,671	1,671
Balance at Jun. 30, 2022	$ 2	182,488	(149,225)	33,265
Balance (in shares) at Jun. 30, 2022	20,137,520
Balance at Dec. 31, 2022	$ 2	185,364	(146,702)	38,664
Balance (in shares) at Dec. 31, 2022	20,374,288
Increase (Decrease) in Stockholders' Equity
Exercise of stock options		13		13
Exercise of stock options (in shares)	3,020
Issuance of common stock under stock incentive plans (in shares)	157,436
Stock-based compensation expense		1,160		1,160
Net income (loss)			761	761
Balance at Mar. 31, 2023	$ 2	186,537	(145,941)	40,598
Balance (in shares) at Mar. 31, 2023	20,534,744
Balance at Dec. 31, 2022	$ 2	185,364	(146,702)	$ 38,664
Balance (in shares) at Dec. 31, 2022	20,374,288
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)				39,373
Net income (loss)				$ 4,646
Balance at Jun. 30, 2023	$ 2	188,126	(142,056)	46,072
Balance (in shares) at Jun. 30, 2023	20,743,422
Balance at Mar. 31, 2023	$ 2	186,537	(145,941)	40,598
Balance (in shares) at Mar. 31, 2023	20,534,744
Increase (Decrease) in Stockholders' Equity
Exercise of stock options		148		148
Exercise of stock options (in shares)	36,353
Issuance of common stock under stock incentive plans		181		181
Issuance of common stock under stock incentive plans (in shares)	172,325
Stock-based compensation expense		1,260		1,260
Net income (loss)			3,885	3,885
Balance at Jun. 30, 2023	$ 2	$ 188,126	$ (142,056)	$ 46,072
Balance (in shares) at Jun. 30, 2023	20,743,422