Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Accumulated deficit
Beginning Balance (in shares) at Dec. 31, 2018		7,592,911
Beginning Balance at Dec. 31, 2018	$ 46,368	$ 1	$ 54,791	$ (8,424)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to vested restricted stock units (in shares)		96,047
Shares issued related to vested restricted stock units	0
Stock-based compensation	1,766		1,766
Net income (loss)	(1,775)			(1,775)
Ending Balance (in shares) at Dec. 31, 2019		7,688,958
Ending 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
Stock-based compensation	1,068		1,068
Tax withholding related to vested restricted stock units	(110)		(110)
Proceeds related to employee stock purchase plan	97		97
Shares issued related to employee stock purchase plan (in shares)		30,825
Shares issued related to employee stock purchase plan	0
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)