Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Retained earnings (accumulated deficit)
Beginning Balance (in shares) at Dec. 31, 2019		7,688,958
Beginning Balance at Dec. 31, 2019	$ 46,870	$ 1	$ 56,557	$ (9,688)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to vested restricted stock units (in shares)		206,354
Shares issued related to vested restricted stock units	0
Tax withholding related to vested restricted stock units	(110)		(110)
Stock-based compensation	1,068		1,068
Proceeds related to employee stock purchase plan	97		97
Shares issued related to employee stock purchase plan (in shares)		30,825
Net income (loss)	5,807			5,807
Ending Balance (in shares) at Dec. 31, 2020		7,926,137
Ending Balance at Dec. 31, 2020	53,732	$ 1	57,612	(3,881)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to the sale of common stock (in shares)		2,051,025
Shares issued related to sale of common stock	22,773		22,773
Exercise of warrants (in shares)		172,874
Exercise of warrants	1,989		1,989
Shares issued related to vested restricted stock units (in shares)		129,138
Shares issued related to vested restricted stock units	0
Tax withholding related to vested restricted stock units	(191)		(191)
Stock-based compensation	2,601		2,601
Proceeds related to employee stock purchase plan	220		220
Shares issued related to employee stock purchase plan (in shares)		25,068
Net income (loss)	6,714			6,714
Ending Balance (in shares) at Dec. 31, 2021		10,304,242
Ending Balance at Dec. 31, 2021	$ 87,838	$ 1	$ 85,004	$ 2,833