CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Balance at Dec. 31, 2019	$ 61,897	$ 214	$ 96,255	$ (43,034)
Balance (in shares) at Dec. 31, 2019		21,443,000
Issuance of unrestricted stock		$ 1	(1)
Issuance of unrestricted stock (in shares)		94,000
Shares surrendered by employees to pay taxes related to unrestricted stock	(50)		(50)
Shares surrendered by employees to pay taxes related to unrestricted stock (in shares)		(15,000)
Stock-based compensation expense	83		83
Net loss	(1,060)			(1,060)
Balance at Mar. 31, 2020	52,408	$ 215	96,287	(44,094)
Balance (in shares) at Mar. 31, 2020		21,552,000
Balance at Dec. 31, 2020	$ 45,670	$ 214	96,104	(50,648)
Balance (in shares) at Dec. 31, 2020	21,378,833	21,379,000
Issuance of unrestricted stock		$ 1	(1)
Issuance of unrestricted stock (in shares)		131,000
Shares surrendered by employees to pay taxes related to unrestricted stock	$ (54)		(54)
Shares surrendered by employees to pay taxes related to unrestricted stock (in shares)		(16,000)
Stock-based compensation expense	197		197
Net loss	(1,448)			(1,448)
Balance at Mar. 31, 2021	$ 44,365	$ 215	$ 96,246	$ (52,096)
Balance (in shares) at Mar. 31, 2021	21,494,236	21,494,000