Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2016	3,291,750
Balance at Dec. 31, 2016	$ 33		$ 4,186	$ (14,927)	$ (10,708)
Net income				12,115	12,115
Stock-based compensation expense			308		308
Tax withholdings paid on behalf of employees for restricted stock units			(209)		(209)
Issuance of Common Stock (in shares)	54,939
Issuance of Common Stock	$ 1				1
Issuance of Common Stock, APIC
Balance (in shares) at Dec. 31, 2017	3,346,689
Balance at Dec. 31, 2017	$ 34		4,285	(2,812)	1,507
Net income				9,467	9,467
Stock-based compensation expense			308		308
Tax withholdings paid on behalf of employees for restricted stock units			(380)		(380)
Issuance of Common Stock (in shares)	41,935
Issuance of Common Stock
Balance (in shares) at Dec. 31, 2018	3,388,624
Balance at Dec. 31, 2018	$ 34		4,213	6,655	10,902
Net income				7,796	7,796
Stock-based compensation expense			254		254
Tax withholdings paid on behalf of employees for restricted stock units			(192)		(192)
Issuance of Common Stock (in shares)	24,181
Balance (in shares) at Dec. 31, 2019	3,412,805
Balance at Dec. 31, 2019	$ 34		$ 4,275	$ 14,451	$ 18,760